Five moles of an ideal gas expands isothermally at 100°C to five times its initial volume. Find the heat flow into the system.
A. 2.5 × 104 J
B. 1.1 × 104 J
C. 6.7 × 103 J
D. 2.9 × 103 J
E. 7.0 × 102 J
Answer: A
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