Given below are two statements. One is labelled as Assertion A and the other is labelled as Reason R . Assertion A : If d Q and d W represent the heat supplied to the system and the work done on the system respectively. Then according to the first law of thermodynamics d Q = d U - d W . Reason R : First law of thermodynamics is based on law of conservation of energy. In the light of the above statements, choose the c

Step-by-step solution

The first law of thermodynamics is stated as d Q = d U - d W . Since d Q is heat supplied to the system and positive thus, d W is work done on the system, i.e., negative work. We know that the first law of thermodynamics deals with work done, and heat energy supplied or removed from a system. Therefore, it is based on the conservation of energy. The law states that energy cannot be created or destroyed; it can only be converted from one form to another.