define first law of thermodynamics

1.	define first law of thermodynamics
Answer» Law of conservation of energy. When a certain amount of heat energy (dQ) disappeas,an equivalent amount of energy in some other. When (dU) is small increase in internal energy and (dW) is small amount of external work done by the system in expansion. dQ=dU+dW<br>The heat energy given to the system is equal to the sum of the increase in the internal energy and the work done by the system .I.e , dQ= du + dw<br>This law states that energy can neither be created nor destroyed can be transformed to one form to other. ORThe sum total of the energy of the universe remains constant<br>no total energy of universe does not constant it increases continuously<br>plz tell me is this ans. is true or not ;this law states that the total energy of the universe always remains constant

Discussion