Question

Internal energy change of a process is equal to

Answer 1

Answer:

It is usually formulated by stating that the change in the internal energy of a closed system is equal to the amount of heat supplied to the system, minus the amount of work done by the system on its surroundings. The law of conservation of energy can be stated like this: The energy of an isolated system is constant.

Answer 2

The internal energy of a system is difference of the heat supplied to the system and the work done by the system.

• The first law of thermodynamics states that ΔU = Q- W, where ΔU is the change in internal energy, Q is the heat suppled to the system and W is the work done by the system.
• The First Law of Thermodynamics actually states the conservation of energy in a thermodynamic process.
• The internal energy constitutes all sum of all the kinetic energy and potential energy of the system.
• Internal energy increases when heat is provided to the system and decreases when the system does some work against the external forces.