NEET Chemistry: Thermodynamics — Practice Set 20

Q1. For a reaction with \( \Delta H = 75.00 \, \text{kJ/mol} \) and \( \Delta S = 250.0 \, \text{J/K} \), what is \( \Delta G \) at 350 K?

Q2. Which of the following is true for an ideal gas undergoing an irreversible adiabatic expansion against constant external pressure?

Q3. What is the standard enthalpy of formation of \(O_2(g)\) at 298 K?

Q4. A spontaneous process is characterized by:

Q5. A gas absorbs 1200 J of heat at constant pressure, and its volume increases by 0.5 L against 2 atm. What is \( \Delta U \)? (1 atm·L = 101.325 J)

Q6. For an ideal gas (\( \gamma = 1.4 \)) compressed adiabatically from 20 L to 5 L at 400 K, calculate \( \Delta U \) if \( C_v = 20.785 \, \text{J/mol·K} \). (1 mol gas)

Q7. A system at constant pressure releases 800 J of heat and contracts by 0.3 L against 2 atm. What is \( \Delta U \)? (1 atm·L = 101.325 J)

Q8. Calculate the bond enthalpy of \(H-H\) in \(H_2(g)\) given \(\Delta H_f (H,g) = 218 \, \text{kJ/mol}\).

Q9. For an ideal gas (\( \gamma = 1.4 \)) expanding adiabatically from 6 L to 12 L at 500 K, calculate the work done if \( C_v = 20.785 \, \text{J/mol·K} \). (1 mol gas)

Q10. A system undergoes a process where 500 J of heat is released, and 300 J of work is done by the system. What is the change in internal energy (\(\Delta U\))?

Chemistry — Thermodynamics

Set 20 of 20

15:00

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For a reaction with \( \Delta H = 75.00 \, \text{kJ/mol} \) and \( \Delta S = 250.0 \, \text{J/K} \), what is \( \Delta G \) at 350 K?