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What is enthalpy and internal energy?

Enthalpy, the sum of the internal energy and the product of the pressure and volume of a thermodynamic system. In symbols, the enthalpy, H, equals the sum of the internal energy, E, and the product of the pressure, P, and volume, V, of the system: H = E + PV.

Why is internal energy a function of temperature and volume?

When the temperature of any system rises, the kinetic energies of the particles also increase causing the internal energy of the system to rise or vice-versa. In this way, the internal energy of a system is dependent on temperature as well as volume.

How does internal energy depend on temperature?

The kinetic molecular theory assumes that the temperature of a gas is directly proportional to the average kinetic energy of its particles, as shown in the figure below. The internal energy of an ideal gas is therefore directly proportional to the temperature of the gas.

Does internal energy depend only on temperature?

The internal energy and enthalpy of ideal gases depends only on temperature, not on volume or pressure. By applying property relations, it is proved that the internal energy and enthalpy of ideal gases do not depend on volume and pressure, repectively.

What is internal energy thermodynamics?

The internal energy of a thermodynamic system is the energy contained within it. It is the energy necessary to create or prepare the system in any given internal state. The thermodynamic processes that define the internal energy are transfers of matter, or of energy as heat, and thermodynamic work.

What is the change in internal energy of a gas in isothermal compression?

For an ideal gas, in an isothermal process, ΔU=0=Q−W, so Q=W. In Isothermal process the temperature is constant. The internal energy is a state function dependent on temperature. Hence, the internal energy change is zero.

Can you convert internal energy to work?

Solution : Yes, For example, in explosion of a bomb, chemical energy (which is a form of internal energy) is converted into kinetic energy.