A sample of 0.1 g of water at 100 C and normal pressure (1.013 10 5 Nm -2 ) requires 54 cal of heat energy to convert to steam at 100 C . If the volume of the steam produced is 167.1 cc, the change in internal energy of the sample, is

1. A. 42.2 J
2. B. 208.7 J
3. C. 104.3 J
4. D. 84.5 J

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