A) a rise in temperature
B) doing external work and a change in temperature
C) doing external work
D) an increase in the internal energy of the gas
Correct Answer: C
Solution :
When a certain amount of heat is supplied to an ideal gas under isothermal condition, then there is no change in internal energy of ideal gas i.e., \[\Delta U=0.\] Hence, \[Q=\Delta U+W\] \[Q=0+W\] Thus, heat given to the system is used in doing work.
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