Answer:
when work is done on the system or heat comes into the system
15.49 should be the answer if that is 12 watt battery.
Answer:
The Internal energy of the gas did not change
Explanation:
In this situation the Internal energy of the gas did not change and this is because according the the first law of thermodynamics
Δ U = Q - W ------ ( 1 )
Δ U = change in internal energy
Q = heat added
W = work done
since Q = W. the value of ΔU will be = zero i.e. No change
Thermometer there's others you can use but i know that's one of them