What is internal energy ?

A gas is compressed at constant pressure of 20 Pa from a volume 10cm^3 to 5m^3 . Later energy of 100 J is added to the gas. What is the change in internal energy ?

An ideal gasin a cylinder is compressed adiabatically to one-third its original volume. During the processif 45 J of work is done on the gas by the compressing agent, what is the change in internal energy?

In a thermodynamic system working substance is ideal gas, its internal energy is in the form of

What is potential energy ?

What is potential energy ? What is its formula ?

When strain is produced in a body within elastic limit, its internal energy

If 1200 calories of heat is removed from a gas which is held at constant volume, what is the change in internal energy of the system?

In a process 701J of heat is absorbed by a system & 394J of work is done by the system What is the change in internal energy for the process

In a process, a system does 238 J of work on its surrounding by absorbing 54 J heat. What is the change in internal energy of system during the operation?

What is the relation between change in internal energy of the system and heat energy supplied to the system or heat extracted from the system?