The calorie is defined as `1 cal= 4.86 `joule Why as `1 cal= 4J` to make the conversions easy?

1 calorie = …… J and 1 kilo-calorie= ……….J

l cal heat and 1 kcal heat

A system is given 300 calories of heat and it does 600 joules of work. How much does the internal energy of the system change in this process (j=4.18joules/cal)

A system is given 300 calories of heat and it does 600 joules of work. How much does the internal energy of the system change in this process (J=4.18 "joules"//cal)

During une cycle uf a heal engine 2000 calories of heat is supplied and 1500 calories rejected. The amount of work done equals (assuming J = 4.186 J//cal )

1 Joule =___ calorie

5g of a gas is contained in a rigid container and is heated from 15^@C to 25^@C . Specific heat capacity of the gas at constant volume is 0.172 cal g ^(-1)^@C^(-1) and the mechanical equivalent of heat is 4.2 J cal . Calculate the change in the internal energy of the gas.