15 J of heat are removed from a gas sample while it is being compressed by a piston that does 30J of work. What is the...
What is the change in the thermal energy of the gas?
How does change the temperature of the gas? (increase, decrease?)
Homework Answers
given that the ammount of heat removed from the gas ΔQ=-15J
negative sign is taken since the heat is removed
the ammount work done ΔW=-30J
negative sign is taken since the work is done on the system
so if ΔU is the thermal energy change in the gas
then
ΔQ=ΔU+ΔW
-15=ΔU-30
ΔU=15J
since there is an increase in thermal energy of the gas
the temparature of the gas increases
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