Most Important Thermochemistry Quiz Test Online

1)

What does 'q' represent in thermodynamic equations?

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

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

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

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

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

7) State functions depend on:

8) What is the term for heat content?

9)

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

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

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

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

13)

According to the first law of thermodynamics, energy:

14) In a spontaneous process, systems move towards:

15) Which of the following is a state function?

16) Enthalpy is defined mathematically as:

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

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

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

20) A non-spontaneous process requires:

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

2)

Which of the following is true regarding enthalpy?

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

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

5)

Which mathematical expression defines enthalpy (H)?

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

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

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

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

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

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

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

13)

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

14) A process is spontaneous if it:

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

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

17)

What does the symbol 'w' represent in thermodynamics?

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

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

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

1) 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?

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

3) Thermochemical data can provide insight into the:

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) 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)?

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

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

8)

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?

9) 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)

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