Waec Model Questions Vol1 2019 Physics Question 34

Practice objective / multiple choice question 34 from the 2019 Waec Model Questions Vol1 Physics examination.

Waec Model Questions Vol1 2019 Physics Objective / Multiple Choice Medium Difficulty
Question 34 WAEC_MODEL_QUESTIONS_VOL1 • 2019 • PHYSICS • objective

A sealed container holds 2.0 mol of an ideal monatomic gas at 300 K and 1.0 atm. The gas is heated at constant volume until its pressure doubles. Then it expands isothermally back to the original pressure. (a) What is the final temperature of the gas after the isothermal expansion? (b) Calculate the total change in internal energy of the gas over the whole process. Give your answer in joules (use $R=8.314\,\text{J·mol}^{-1}\text{K}^{-1}$).

Answer Options

A. T_final = 600 K; ΔU_total ≈ 9.0×10^3 J
B. T_final = 450 K; ΔU_total ≈ 5.0×10^3 J
C. T_final = 750 K; ΔU_total ≈ 7.5×10^3 J
Correct Answer D. T_final = 600 K; ΔU_total ≈ 7.5×10^3 J
Correct Answer
D
Correct Option:
T_final = 600 K; ΔU_total ≈ 7.5×10^3 J

About This Question

This is Waec Model Questions Vol1 2019 Physics Question 34. It is one of the objective questions from the 2019 Waec Model Questions Vol1 Physics examination.

Difficulty level: Medium .

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