Use the Following Diagram to Answer the Next Problem $\to$ B?
A)30

question 14

Multiple Choice

Use the following diagram to answer the next problem. An ideal heat engine uses 0.01 mol of gas and operates between a hot reservoir at
T_H = 400 K and cold reservoir at T_L = 300 K, in a cycle from a→b→c→d→a. From a→b the gas undergoes an isothermal expansion, changing its volume from Va to 2.5Va. From b→c, the pressure is reduced at a constant volume. From c→d, the gas undergoes an isothermal compression, and from d→a, the pressure is increased at a constant volume until the gas is back at the original condition at a.

-How much heat is absorbed in going from a $\to$ b?

• A)30.5 J
• B)7.62 J
• C)22.9 J
• D)8.31 J
• E)0.917 J

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