Quiz for Thermodynamics

Q1: Which law of thermodynamics defines internal energy?

A. First law B. Second law C. Third law D. Zeroth law

Q2: Enthalpy is defined as:

A. E + PV B. E - PV C. PV - E D. E/PV

Q3: Which of the following is not a thermodynamic process?

A. Isothermal B. Adiabatic C. Cyclic D. Reversible

Q4: Which of the following processes has ΔU = 0?

A. Adiabatic B. Isobaric C. Isothermal D. Isochoric

Q5: Which quantity is zero in a reversible isothermal expansion of an ideal gas?

A. ΔU B. q C. w D. ΔH

Q6: Work done in an adiabatic process is:

A. Zero B. Positive C. Negative D. Depends on expansion or compression

Q7: The unit of entropy is:

A. J B. J/mol C. J/K D. J/mol·K

Q8: Which process has maximum entropy?

A. Free expansion of gas B. Melting of ice C. Boiling of water D. All have same entropy

Q9: For a spontaneous process, ΔG should be:

A. Positive B. Negative C. Zero D. Maximum

Q10: The standard enthalpy of formation of an element in its standard state is:

A. Zero B. One C. Positive D. Negative

Q11: Which law introduces the concept of temperature?

A. First law B. Second law C. Third law D. Zeroth law

Q12: Which of the following is not a path function?

A. Heat B. Work C. Internal energy D. None of the above

Q13: The heat content of a system is known as:

A. Entropy B. Enthalpy C. Work D. Gibbs energy

Q14: In adiabatic process, heat exchange is:

A. Maximum B. Zero C. Minimum D. Infinite

Q15: What is the sign of ΔH for an exothermic reaction?

A. Positive B. Negative C. Zero D. Can’t say

Q16: What is the relationship between ΔG, ΔH and ΔS?

A. ΔG = ΔH - TΔS B. ΔG = ΔH + TΔS C. ΔG = ΔS - TΔH D. ΔG = ΔH + ΔS

Q17: The third law of thermodynamics deals with:

A. Entropy at 0 K B. Internal energy C. Enthalpy D. Work done

Q18: Which function determines equilibrium at constant T and P?

A. Enthalpy B. Entropy C. Gibbs free energy D. Internal energy