1. First, you want to convert cal to Joules (cal --> J). To do this, multiply the value of cal by 4.184 (1 cal = 4.184J) 500cal x 4.184J = 2092J ------------ 1 cal

2. Calculate the change in internal energy of the gas (ΔU = heat – work).ΔU = 2092J heat - 500J work = 1595J change in internal energy

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Oct 6th, 2014

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