Most Important Thermochemistry Quiz Test Online

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

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

3)

What does 'q' represent in thermodynamic equations?

4)

According to the first law of thermodynamics, energy:

5)

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

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

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

8) A non-spontaneous process requires:

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

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

11) In a spontaneous process, systems move towards:

12) Enthalpy is defined mathematically as:

13) What is the term for heat content?

14) State functions depend on:

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

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

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

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

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

20) Which of the following is a state function?

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

2)

What does the symbol 'w' represent in thermodynamics?

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

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

5) A process is spontaneous if it:

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

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

8)

Which of the following is true regarding enthalpy?

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

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

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

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

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

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

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

16)

Which mathematical expression defines enthalpy (H)?

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

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

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

20)

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

1) 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)

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

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

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

5) Thermochemical data can provide insight into the:

6) 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)?

7)

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?

8) 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?

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

10)

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?