An ideal gas undergoes an isothermal expansion from volume to volume at temperature . Which of the following thermodynamic statements is TRUE?
Answer and explanation
Correct answer: C. Internal energy remains constant while heat absorbed equals work performed
- Step 1: For an ideal gas, internal energy depends only on temperature: . Step 2. By the first law: . Step 3. As gas expands, it absorbs heat equal to the work done on the surroundings. Answer: Internal energy remains constant while heat absorbed equals work performed. Why not the others: Pressure decreases by half according to Boyle's Law.
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