Most Important Thermochemistry Quiz Test Online

1) What is the term for heat content?

2) The real or imaginary surface separating the system from the surroundings is called the:

3) The portion of the universe outside the system is known as:

4) Which of the following is an example of a non-spontaneous process?

5) For a reaction at constant atmospheric pressure, heat is used:

6) In a spontaneous process, systems move towards:

7) Which of the following is NOT a way to transfer energy to or from a system?

8)

According to the first law of thermodynamics, energy:

9) What is measured during a change in the state of a system?

10) A non-spontaneous process requires:

11) In the context of pressure-volume work, when work is done by the system, the sign of W is:

12) What is the term for the part of the universe under study?

13) If the volume of a gas is not allowed to change, then ΔV equals:

14)

What does 'q' represent in thermodynamic equations?

15) State functions depend on:

16) Which of the following is a state function?

17) The sum of kinetic and potential energies of a system is called:

18) Enthalpy is defined mathematically as:

19) A process that proceeds on its own without external assistance is termed as:

20)

Which of the following is a characteristic of a spontaneous process?

1) Which of the following is NOT a state function?

2) Which of the following is an example of an exothermic reaction?

3) The surface separating the system from the surroundings is called the:

4)

What does the symbol 'w' represent in thermodynamics?

5) At constant pressure, the heat exchanged by a system with its surroundings is called:

6) In an endothermic reaction, the enthalpy change (ΔH) is:

7) In the equation ΔE = q - PΔV, if ΔV = 0, then ΔE is equal to:

8) A state function is a property that depends on:

9) If a system does work on the surroundings, the value of 'w' is:

10)

Which mathematical expression defines enthalpy (H)?

11) The first law of thermodynamics is also known as the:

12) Which of the following is an example of an endothermic reaction?

13)

In an exothermic reaction, the enthalpy change (ΔH) is:

14) Which of the following processes is non-spontaneous?

15) What quantity of heat is absorbed when one mole of nitrogen combines with one mole of oxygen to yield nitrogen oxide (NO)?

16) For a reaction that occurs at constant pressure, the change in enthalpy (ΔH) is equal to:

17) The amount of heat evolved during the combustion of carbon in oxygen is -393.7 kJ/mol. This reaction is:

18)

Which of the following is true regarding enthalpy?

19) A process is spontaneous if it:

20) If a system absorbs heat from the surroundings, the value of 'q' is:

1) Thermochemical data can provide insight into the:

2) A system releases 400 J of heat and has 100 J of work done on it. Calculate the change in internal energy.

3) Which of the following is NOT directly determined by thermochemical measurements?

4)

If a reaction occurs in a closed container and the internal energy increases by 300 J while 100 J of work is done on the system, how much heat was transferred?

5) A reaction has a negative enthalpy change (ΔH) and occurs spontaneously at room temperature. What can be inferred?

6) A gas expands against a constant external pressure of 2 atm, and its volume increases from 10 L to 15 L. If the internal energy change is 400 J, what is the enthalpy change? (1 L atm = 101.3 J)

7)

In a system, 500 J of heat is absorbed and 200 J of work is done by the system. What is the change in internal energy?

8) Consider the formation of a chemical bond. Thermochemical principles suggest that this process is typically:

9) If a reaction absorbs 250 J of heat and the system expands, performing 100 J of work, what is the change in internal energy (ΔE)?

10) For a reaction at constant pressure, the change in internal energy is 200 kJ, and the system does 50 kJ of work. What is the enthalpy change?