Chemical and physical changes 12. For the following question, assume a chemical change that is endothermic taking place at constant p =1 bar. %3D a. What is meant by a chemical change? b. What is the sign of the enthalpy change in this endothermic process? c. Assuming this chemical change can be described by standard enthalpy of formation values, what conditions does the change take place under (what state? What temperature can be assumed if not stated)? d. Explain why an endothermic chemical change both requires and releases energy. Your explanation should include what is occurring on the molecular level.

Chemical and physical changes 12. For the following question, assume a chemical change that is endothermic taking place at constant p =1 bar. %3D a. What is meant by a chemical change? b. What is the sign of the enthalpy change in this endothermic process? c. Assuming this chemical change can be described by standard enthalpy of formation values, what conditions does the change take place under (what state? What temperature can be assumed if not stated)? d. Explain why an endothermic chemical change both requires and releases energy. Your explanation should include what is occurring on the molecular level.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

See similar textbooks

Related questions

Q: A 15.0 g sample of qu water at 30.0 °C and Assuming no heat is a answer has the correc

A: i have the final answer which is 19.3 degree Celsius but i dunno how to get it., i used the formula…

Q: e the standard enthalpy change, 4,H for the reaction.

Q: thermometer A 52.6 g sample of polystyrene is put into a calorimeter (see sketch at right) that…

A: In the process, the styrene will release the heat. The water will absorb the heat from the sample of…

Q: Consider a gas cylinder containing 0.250 moles of an ideal gas in a volume of 2.00 L with a pressure…

A: Given: The no. of moles of the gas(n)=0.250 moles. The volume of the gas(V)=2.00 L. The initial…

Q: A "coffee-cup" calorimetry experiment is run for the dissolution of 1.50 g of aluminum acetate…

A: To calculate the heat of the dissolution of aluminum acetate, we can use the equation: q = m × c ×…

Q: 1. A metal sample weighing 35.0 g and at a temperature of 99.1°C was placed in in a calorimeter at…

A: Mass of metal sample , m = 35.0 g

Q: Which of the following statements is correct? a. Enthalpy is a state function and heat transfer is a…

A: State functions are the values which depend on the state of the substance, like temperature,…

Q: 6. If you added a 10 gram metal piece at 100 °C to 100 mL of water at 0 °C or at 20°C, which…

A: According to heat transfer (Calometry) principle- heat is transferred from the body of higher…

Q: A solution is made by mixing 285.0 mL285.0 mL of ethanol initially at 12.0 ∘C12.0 ∘C with 285.0…

Q: How much energy is required to heat 36.0 g H2O from a liquid at 65°C to a gas at 115°C?

A: Step 1: Energy required to convert water from 65°C to 100°C can be calculated as: m: mass of the…

Q: For a particular process q-10 kJ and w 25 kJ. Which of the following statements is true? n of a The…

Q: true or false enthalpy is characteristic of each substance varies with the presence of impurities

A: Enthalpy is a characteristic of a thermodynamic system. It is the measure of total heat content…

Q: Consider a gas cylinder containing 0.250 moles of an ideal gas in a volume of 6.00 L with a pressure…

Q: 2. Determine the specific heat capacities (to 3 significant figures) of the mystery materials,…

Q: The molar heat capacity at constant pressure for CO(g) is 6.97 cal mol' K-1. How much heat in cal is…

Q: Which is/are state functions: I. work, w II. Heat, q III. enthalpy, H IV. Internal energy, E

A: Here we have to choose which are state function.

Q: What is the formula to calculate heat energy required to raise the temperature of any substance? O…

A: we need to select the correct formula to calculate heat energy needed to raise the temperature of a…

Q: A 100.0 g sample of an unknown metal at 125oC is added to 500.0g of water at 27.5oC. The final…

Q: For which of the following species is the standard enthalpy of formation not equal to zero? O a.…

A: Standard enthalpy of formation of any species is the change of enthalpy during the formation of 1…

Q: Hydrazine, N2H4 is used as rocket fuels. The thermochemical equations for the combustion of…

A: Given reaction, N2H4 + O2→ N2 + 2H2O ∆H = -622.4 KJ 1 mole of combustion of N2H4 produces -622.4…

Q: Calcuate the amount of heat in kJ neccessary to raise the temperatue of 50.0 g of a substance by…

Q: Please don't hand riteeg solution

A: The objective of the question is to find the final volume of the gas in the cylinder after the…

Q: What statement is False? A). in an endothermic process, heat is transferred from the surroundings…

A: *Statement-A The reaction in which heat is released from system to surrounding is called exothermic…

Q: energy

Question

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 2 steps

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.

Similar questions

calculate the final temperature if 55.0g of liquid water at 90.0C is added to 35.0g of liquid water at 15.0C
Answer the following. Thank you!
12. Calculate the amount of heat needed to warm 24.6kg of water from a room temperature of 20.0C to 60.0C show the work
Explained everything
Determine the final temperature after 25.0 kJ of energy is added to 500.0 g of water initially at 21.5 °C.
The molar heat capacity at constant pressure for CO(g) is 6.97 cal mol-1 K-1. How much heat in cal is required to raise 0.62 g of CO(g) from 298 to 423K? Atomic Mass: C: 12.011 g/mol O: 15.999 g/mol
6 .If 2.1g of 100.0C steam begins to condense on a container of liquid water at 25.0C and they eventually reach the same temperature of 46.7C what was the mass of liquid water in the container? *Assume all heat from the steam cooling goes into the liquid water.*
14. Which of the following statements are true about a system that absorbs 300J of heat from the surroundings while performing 150 J of work on the surroundings? I. The internal energy change of the system is +150 J. The process described above is exothermic. The internal energy change of the system is -150 J. The process described above is endothermic. II. III. IV. а. I, II b. II, III с. I, IV d. III, IV
pls.ans.wer
One mole of CO2 gas is heated and its temperature increases by 10 K. If the same heat is given to 2 moles of H2S gas, how much does its temperature change? (Assume that the molecular vibrations don't change the heat absorption).
A solution is made by mixing 287.0 mL287.0 mL of ethanol initially at 13.1 ∘C13.1⁢ ∘C with 287.0 mL287.0 mL of water initially at 22.0 ∘C22.0⁢ ∘C. What is the final temperature of the solution assuming that no heat is lost? The density of ethanol is 0.789 g/mL0.789 g/mL and the density of water is 1.00 g/mL1.00 g/mL. The specific heat of ethanol is 2.46 J/g·°C2.46 J/g·°C and the specific heat of water is 4.184 J/g·°C4.184 J/g·°C.
15. Calculate the amount of heat required to raise the temperature of a 0.79g sample of iquid ethanol from 298K to 306.7K The specific heat of ethanol is 2.46J/g x °C.