An expandable container holds 2.30 mole of He gas with an initial pressure of 770 kPa and an initial volume of 2.10 L. The gas expands isothermally to a final pressure of 350 kPa. How much heat is gained by the gas in this process?
A) 1280 J
B) 792 J
C) 685 J
D) 1370 J
E) 1700 J

Question

Quizplus · Accepted Answer

The heat gained by the gas can be calculated using the formula for isothermal expansion: Q = nRT ln(Vf/Vi). First, calculate the final volume using P1V1 = P2V2. Then, use the ideal gas constant R = 8.314 J/(mol·K) and the temperature derived from the initial conditions to find Q. The calculation yields approximately 1280 J.

An Expandable Container Holds 2