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veneziaramirez 3I wrote:Why is 982 delta U? Wouldn’t it be 982J- 492J? Aren’t work and delta U the same thing as according to 8.3 c?
The internal energy of a system is delta U, so delta U is given at 982 J. The equation is delta U = w + q, where heat is given at +492 J, so 982J - 492J will give you how much work is done.
Delta U and work are only equal when q=0 where no heat is absorbed or released. In Exercise 8.3, there is no change in temperature.
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