Which statement about the reaction between calcium oxide and water is correct?
a) 65.2 kJ of heat are released for every mole of CaO that reacts.
b) 130 kJ of heat are released for every mole of H2O that reacts.
c) 130 kJ of heat are absorbed for every mole of CaO that reacts.
d) 65.2 kJ of heat are absorbed for every mole of H2O that reacts.

Which Statement About The Reaction Between Calcium Oxide And Water Is Correct?a) 65.2 KJ Of Heat Are

Answers

Answer 1

The heat that is released is 1600 J

65.2 kJ of heat are released for every mole of CaO that reacts.

What is the heat released?

For every mole of CaO that combines with water, 65.2 kJ of heat are generated, according to thermodynamic statistics. As a result, a considerable amount of heat is emitted throughout the reaction, making it highly exothermic.

We know that;

H = mcdT

H = heat absorbed or evolved

m = mass of the substance

c = Heat capacity of the substance

dT = temperature change.

H = 60 * 1 * (43 - 70)

H = -1600 J

Learn more about enthalpy:https://brainly.com/question/16720480

#SPJ1


Related Questions

Question 5(Multiple Choice Worth 3 points)
(07.02 LC)

The substances below are listed by increasing specific heat capacity value. Starting at 30.0 °C, they each absorb 100 kJ of thermal energy. Which one do you expect to increase in temperature the least?

a) Cadmium, 0.230 J/(g °C)
b) Sodium, 1.21 J/(g °C)
c) Water, 4.184 J/(g °C)
d) Hydrogen, 14.267 J/(g °C)

Answers

Component form of the vector v is as follows: 4 3 1.5 1 Using the standard basis vectors I and j), express the vector w as follows: 3 two 1 4 pp . 1 3 w 3.5 C. V plus w= d. Determine the vector v's magnitude

What does "vector" mean?

Latin word for "carrier" is "vector." Point A is transported to point B by vectors. The orientation of the vectors AB is the direction in which point A is moved in relation to point B, and the amplitude of the vector is the width of the line connecting the two locations A and B. The terms Euclidean vectors and spatial vectors are also used to refer to vectors.

A vector space is what?

A vector space, also known as a linear space, is a collection of things called vectors that can be added to and multiplied ("scaled") by figures called scalars in the fields of mathematics, physics, and engineering.

To know more about vector visit:

https://brainly.com/question/27854247

#SPJ1

In the Periodic Table below, shade all the elements for which the neutral atom has an outer electron configuration of ms2nd2, where n and m are integers, and =m+n1.

Answers

The elements that have an outer electron configuration of ms2nd2 are located in the d-block of the periodic table and include some of the transition metals and lanthanides.

What is the periodic table?

To determine which elements in the periodic table have this outer electron configuration, you can look at the position of the d-block elements in the table. The d-block elements are located in the middle of the table and include the transition metals. These elements have partially filled d orbitals, which can accommodate up to 10 electrons.

Elements in the d-block with an atomic number of 21 through 30 (scandium through zinc) have an outer electron configuration of d10s2 and do not fit the ms2nd2 configuration. However, elements in the d-block with an atomic number of 39 through 48 (yttrium through cadmium) have an outer electron configuration of d10s2p1 and can have the ms2nd2 configuration by removing the single electron in the p orbital. Elements in the d-block with an atomic number of 57 through 80 (lanthanum through mercury) also have the possibility of having an outer electron configuration of ms2nd2.

Learn more about periodic table:https://brainly.com/question/11155928

#SPJ1

CaCO3 + 2HCI =CaCl2 + H₂O + CO2
5. Calcium carbonate (CaCO3) combines with HCl to produce calcium chloride (CaCl₂),
water, and carbon dioxide gas (CO₂). How many grams of HCI are required to react with
6.35 mol CaCO3?

Answers

463.5 grams of HCl are required to react with 6.35 moles of CaCO₃.

What is meant by molar mass?

Mass of one mole of substance is referred to as the molar mass. The molar mass of a substance can be calculated by adding up the atomic masses of all the atoms in a molecule.

Balanced chemical equation for the reaction between calcium carbonate (CaCO₃) and hydrochloric acid (HCl) is: CaCO₃ + 2HCl → CaCl₂ + H₂O + CO₂

6.35 mol CaCO₃ * 2 mol HCl / 1 mol CaCO₃ = 12.7 mol HCl

Now, we use the molar mass of HCl (36.46 g/mol) to convert from moles to grams: 12.7 mol HCl * 36.46 g/mol = 463.5 g HCl

Therefore, 463.5 grams of HCl are required to react with 6.35 moles of CaCO₃.

To know more about molar mass, refer

https://brainly.com/question/837939

#SPJ1

What happens when a solid is dissolved into a liquid?
.

Answers

The solid has broken down into pieces so small that its particles spread all throughout the new mixture

6. What is the pH of a 0.25 M solution of NH4Cl? [Kb(NH3) = 1.8  10–5

Answers

The Ammonium Chloride solution at 0.25 M has a pH of 2.67.

Why is the pH of Ammonium Chloride below 7?

As a result, the weak basic (Chlorine) in the solution is overpowered by the conjugate acid (Ammonium cation), making the solution mildly acidic. According to the equation pH =log[Hydrogen ion], an acidic solution has a pH lower than 7. Aqueous ammonium chloride solution has a pH that is less than 7.

Ammonium cation + Water ⇌ Nitrogen trihydride + Hydronium ion

Kb = [Nitrogen trihydride][Hydronium ion] / [Ammonium cation]

[Nitrogen trihydride] = [Hydronium ion] = x

[Ammonium cation] = 0.25 - x

Kb = [Nitrogen trihydride][Hydronium ion] / [Ammonium cation]

1.8 × 10–5 = x² / (0.25 - x)

1.8 × 10–5 = x² / 0.25

x² = 4.5 × 10–6

x = 2.12 × 10–3

pH = -log[Hydronium ion] = -log(2.12 × 10–3) = 2.67

To know more about solution visit:-

https://brainly.com/question/30665317

#SPJ1

A flask filled to the 25.0 ml mark contain 29.97 g of a concentrated salt water solution. What is the density of the solution?

Answers

A concentrated saltwater solution weighing 29.97 g and fitting into a flask to the mark of 25.0 ml has a density of about 1199.2 g/L.

How is the density of the solution determined?

By dividing the solution's mass by its volume, we may get its density: density = mass/volume

We need to know the density of water at the solution's temperature as well as the capacity of the flask up to the 25.0 ml level in order to calculate the volume of the solution.

Since 1 mL = 0.001 L, volume is equal to 25.0 mL, or 0.0250 L.

Now, we may determine the solution's density as follows:

1199.2 g/L or 29.97 g/0.0250 L is what is referred to as density.

To learn more about density visit:

brainly.com/question/26279986

#SPJ9

At 25 ∘C
, the equilibrium partial pressures for the reaction

A(g)+2B(g)↽−−⇀C(g)+D(g)

were found to be A=5.63
atm, B=5.00
atm, C=5.47
atm, and D=5.63
atm.

What is the standard change in Gibbs free energy of this reaction at 25 ∘C
?

Answers

The standard change in Gibbs free energy of the reaction at 25 ∘C is -1.69 kJ/mol.

What is standard change?

To find the standard change in Gibbs free energy of the reaction, we need to use the following equation:

ΔG° = -RT ln(K)

where ΔG° is the standard change in Gibbs free energy, R is the gas constant (8.314 J/mol·K), T is the temperature in Kelvin (25 °C = 298 K), and K is the equilibrium constant.

To find K, we need to use the equilibrium partial pressures:

K = (PC × PD) / (PA × PB²)

where PA, PB, PC, and PD are the equilibrium partial pressures of A, B, C, and D, respectively.

Substituting the values, we get:

K = (5.47 atm × 5.63 atm) / (5.63 atm × (5.00 atm)²)

K = 0.6176

Now we can calculate the standard change in Gibbs free energy:

ΔG° = -RT ln(K)

ΔG° = -(8.314 J/mol·K) × (298 K) × ln(0.6176)

ΔG° = -1,690 J/mol or -1.69 kJ/mol

Therefore, the standard change in Gibbs free energy of the reaction at 25 ∘C is -1.69 kJ/mol.

What is free energy?

Free energy, also known as Gibbs free energy, is a thermodynamic quantity that represents the amount of energy in a system that is available to do work at a constant temperature and pressure. It is denoted by the symbol G and is expressed in units of joules (J) or calories (cal).

In simple terms, free energy is the energy that can be used to do work. It is defined by the equation:

ΔG = ΔH - TΔS

where ΔH is the change in enthalpy (heat content) of the system, ΔS is the change in entropy (disorder) of the system, and T is the absolute temperature in Kelvin.

If ΔG is negative, the reaction is spontaneous and can proceed without the input of external energy. If ΔG is positive, the reaction is non-spontaneous and requires energy input to proceed. If ΔG is zero, the system is at equilibrium.

To know more about free energy, visit:

https://brainly.com/question/14150518

#SPJ1

What is eutectic temperature

Answers

The eutectic point is the lowest temperature at which the liquid phase is constant at a particular pressure.

What does the word "eutectic" mean?

A melting composition known as a eutectic consists of at least two components that melt and freeze at the same rates. The components combine during the crystallisation phase, operating as a single component as a result.

What are eutectic pressure and temperature?

The eutectic is the system's lowest melting point under its own pressure; it has a matching temperature called the eutectic temperature and produces the eutectic liquid as a result. In terms of composition, eutectic liquids are located between the system's solid phases.

To know more about eutectic visit:-

https://brainly.com/question/27886492

#SPJ1

What is true of spontaneous reactions?
O They are indicated by a negative change in Gibbs free energy.
O They have a positive value of AS.
O They are instantaneous.
O They always release heat.

Help 20pts

Answers

1. They are indicated by a negative change in Gibbs free energy.

Explanation: Spontaneous reactions are those that occur without any external input of energy. A negative change in Gibbs free energy (ΔG) indicates that a reaction is spontaneous. The other options do not always hold true for spontaneous reactions. The value of entropy change (ΔS) can be positive or negative, spontaneous reactions are not necessarily instantaneous, and they do not always release heat.

The two possible units of molarity are

Answers

Answer: The units for molarity are moles/liter.

Similarly, the equation to find molarity is moles divided by liters.

Explanation:  

mol / L is a unit of molar concentration. These are the number of moles of dissolved material per liter of solution. 1 mol / L is also called 1M or 1molar. Mol / m3 is also a unit of molar concentration.

Molarity is expressed in units of moles per liter (mol / L). This is a very common unit, so it has its own symbol, which is the uppercase M. A solution with a concentration of 5 mmol / l is called a 5 M solution or has a concentration value of 5 mol.

The molar concentration of the solution is equal to the number of moles of the solute divided by the mass of the solvent (kilogram), and the molar concentration of the solution is equal to the number of moles of the solute divided by the volume of the solution (liter). increase.

Round to 2 significant
figures.
5,249

Answers

5,250. The number was rounded up from 5,249 because the last digit, 9, is greater than or equal to 5.

What is rounded up?

Rounding up is a mathematical operation that involves increasing a number to its nearest whole number. It is commonly used when dealing with money, measurements, or statistics. When rounding up, the number is increased to the next highest whole number. For example, if a number is 6.7, it would be rounded up to 7. Rounding up is often used when dealing with exact measurements or estimates to simplify the calculations. It can also be used to make the results of a calculation easier to understand. In the case of money, rounding up can be used to round a number to the nearest dollar. This prevents dealing with fractional amounts of money. Rounding up can also be utilized in statistical analysis, such as in the calculation of mean or median. This simplifies the data and prevents dealing with fractions or decimals.

To learn more about  rounded up

https://brainly.com/question/17396482

#SPJ9

Other Questions
Mitochondrion definition Which substance is not a structural isomer of hexyne?a) hex-2-yne b) hex-3-yne c) 3,3-dimethylpent-1-yne d) 4-methylpent-1-yne e) 2,3-dimethylbuta-1,3-diene Wiretapping involves the capability of authorized users to search through storage, directories, or files for private information. (True / False) A subsistence economic system implies nearly total self-sufficiency of its members. The von Thnen model is based on the observation that the value of agricultural land is determined based on soil fertility and climate. What was the role of the Eight Judges in the Roman Government? They allowed plebeians to have a voice in government. They formed the executive, branch of the Roman Republic. They ran the courts and governed provinces. They expanded the power of Roman noblemen. How are the people of Washington working to address the problem of overfishing in their state? Choose three correct answers.by limiting fishing for recreational purposesby closing some fisheries in tribal communitiesby setting a rate on harvesting certain types of fishby removing salmon from the diet of most tribal groupsby increasing the construction of dams along the areas riversby banning all salmon and steelhead trout fishing along the coast A $1,000 par value bond with a maturity of five years has a current price of $835 and annual interest payments are $60. what is the yield to maturity? What loan alternative would you choose? (just take into account the interest rate):a. loan at 15.5% per annum, computed annuallyb. loan at 15% per annum, computed quarterly(please use the formula method) blue water homes has 8 percent bonds outstanding that mature in 13 years. the bonds pay interest semiannually. these bonds have a par value of $1,000 and are callable in 5 years at a call price of $1050. what is the yield to call if the current price is equal to $1110.92? a. 3.125 percent by. 9.66 percent c. 4.83 percent d. 7.93 percent e. 6.25 percent forgoing current consumption so that those resources can be used to produce new capital is called: a. scarcity. b. absolute advantage. c. comparative advantage. d. saving. e. investment. the nurse is providing discharge education to a 30-year-old woman who has undergone a biliopancreatic diversion with duodenal switch. what guidelines should the nurse provide to the client? select all that apply. The Gabrielsons ran a family relay race. The distance run by each family member (in kilometers) is listed below.11,4,8,2,511,4,8,2,5 Which example describes sharing risk?getting car insurancedeciding not to buy a caronly driving during the daydriving a car at high speeds 5 out of 7 questions. PLEASE help me. Please help! INSTRUCTIONS are below on image!!!! ONLY HELP IF YOU KNOW HOW TO! IF YOU DON'T DO THIS CORRECTLY AND JUST USE a useless answer i will report you. this is a serious project and i would love the help. thank you :) (P.S I will definitely mark you brainliest if you help me well!!)YOU MUST USE iambic pentameter and use 10 syllables stressed and unstressed in each sentence. A story based in school must be included. Instructions are on image. Arguments supporting development of oil exploration in the Arctic National Wildlife Refuge include all of the following EXCEPT: A. The infrastructure already in place at Prudhoe Bay can be used to process oil from the Refuge. B. Development of domestic oil would improve the balance of trade and lessen U.S. dependence on foreign oil. C. The Arctic National Wildlife Refuge is an extremely fragile ecosystem, in part because of its harsh climate. D. The Arctic National Wildlife Refuge, established in 1980, is a remote location seldom visited by tourists. D. There is a high probability of finding oil within the Refuge. Describe the texture of the marrow from the beef bone.Biology question According to this graph, the accelerationis approximately:A. 12 m/sC. 4 m/sVelocity (m/s)14121012 2 3 4Time t (s)B. 1.5 m/s2D. 3 m/s2Help please The informational content of dividends refers to a link between dividends and future earnings. In other words, investors view a change in dividends, up or down, as a signal that management expects future earnings to change in the same direction.Select one:TrueFalse population. It also shows the running speed of a new group ofpredators that recently moved into the area due to habitat loss.You have been asked to identify the portion of the rabibit populationthat will likely survive to pass on its traits to future generations.Which portion of the graph will you highlight?Select one:O the bottom portionOO the far right portionthe far left portionO the middle portion