If 400 joules of heat are added to a gas in an isochoric process, what is the change in its internal energy?
O A. 400 J
O B.-400 J
O C. 100 J
OD. 200

A. 400 J

Explanation:

Because the process is isochoric, no volume change, so no work, so none of the energy is lost or converted. In other words, the system will gain and hold onto all of the J of heat put into it, which was 400J

where are the vectors ?

continuous conducting path for current, power supply