ThermodynamicsMedium
Question
A system absorbs 20 kJ heat and does 10 kJ of work. The internal energy of the system
Options
A.increases by 10 kJ
B.decreases by 10 kJ
C.increases by 30 kJ
D.decreases by 30 kJ
Solution
$\Delta U = q + w = ( + 20) + ( - 10) = + 10\text{ J}$
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