NEET Chemistry: Thermodynamics — MCQ Test 16

Q6. For a reaction, \(\Delta H = -150 \, \text{kJ}\) and \(\Delta S = -0.5 \, \text{kJ/K}\). Below what temperature is it spontaneous?

Q7. For the process \(N_2(g) \rightarrow 2N(g)\), what are the signs of \(\Delta H\) and \(\Delta S\)?

Q8. Which property is intensive?

Q9. Calculate \(\Delta H\) for \(C_2H_2(g) + 2H_2(g) \rightarrow C_2H_6(g)\) using: \(\Delta H_f^\circ (C_2H_2,g) = 226.7 \, \text{kJ/mol}\), \(\Delta H_f^\circ (C_2H_6,g) = -84.7 \, \text{kJ/mol}\).

Q10. The enthalpy of vaporization of a liquid is 32.00 kJ/mol at 350 K. What is \( \Delta U \) if \( \Delta n_g = 1 \)? (\( R = 8.314 \, \text{J/mol·K} \))

NEET Chemistry — Thermodynamics

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For the vaporization of 72 g of water at 373 K (\( \Delta H_{vap} = 40.79 \, \text{kJ/mol} \), molar mass = 18 g/mol), what is \( \Delta S_{sys} \)?

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About this NEET MCQ Test

This page provides a free online MCQ test for NEET Chemistry preparation, focusing specifically on the chapter Thermodynamics. It contains 10 carefully selected multiple-choice questions (MCQs) designed to test your conceptual understanding and exam readiness.

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Key concepts covered in this specific test include Vaporization, Rightarrow, Expanding, Adiabatically, Calculate, and Irreversibly.

Taking these timed MCQ tests helps you simulate the real NEET exam environment. Detailed step-by-step explanations are provided for every question to help you learn from your mistakes and strengthen your fundamentals.

Preview of Questions in this Test

Q1. For the vaporization of 72 g of water at 373 K (\( \Delta H_{vap} = 40.79 \, \text{kJ/mol} \), molar mass = 18 g/mol), what is \( \Delta S_{sys} \)?

  • A. 109.4 J/K
  • B. 437.5 J/K
  • C. 218.8 J/K
  • D. 40.79 J/K

Q2. For \( 2SO_3(g) \rightarrow 2SO_2(g) + O_2(g) \), \( \Delta H = 197.80 \, \text{kJ/mol} \) at 298 K, what is \( \Delta U \)? (\( R = 8.314 \, \text{J/mol·K} \))

  • A. 200.3 kJ/mol
  • B. 197.8 kJ/mol
  • C. 2.48 kJ/mol
  • D. 195.3 kJ/mol

Q3. For an ideal gas (\( \gamma = 1.4 \)) expanding adiabatically from 5 L to 10 L at 500 K, calculate the work done if \( C_v = 20.785 \, \text{J/mol·K} \). (1 mol gas)

  • A. 2516 J
  • B. -1258 J
  • C. -2516 J
  • D. 0 J

Q4. Calculate the work done when 1 mol of an ideal gas expands irreversibly against a constant external pressure of 2 atm from 5 L to 10 L. (1 atm·L = 101.3 J)

  • A. -1013 J
  • B. 1013 J
  • C. -506.5 J
  • D. 2026 J

Q5. For \( CH_4(g) + Cl_2(g) \rightarrow CH_3Cl(g) + HCl(g) \), \( \Delta H = -103.00 \, \text{kJ/mol} \) at 298 K. What is \( \Delta U \)? (\( R = 8.314 \, \text{J/mol·K} \))

  • A. -105.5 kJ/mol
  • B. -103 kJ/mol
  • C. -100.5 kJ/mol
  • D. -98 kJ/mol

+ 5 more questions in the actual test

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