Question

What is thermochemistry and how is it related to thermodynamics. What are the different forms of energy.

Answer 1

THERMODYNAMICS

The branch of science which deal with the energy changes associated with physical and chemical changes is called thermodynamics. It also tells about the feasibility of any process under the given conditions.

ENERGY

Basically energy is the capacity of do work or energy is the capacity of transfer heat.

Thermochemistry :

Thermochemistry is the branch of physical chemistry which deals with the thermal or heat changes caused by chemical reactions. It is based on first law of thermodynamics.

Different form of energy: Work, Heat, enthaly, entropy, gibbes free energy,

Enthalpy of Formation, :

It is the enthalpy change when one mole of a substance is formed from its elements in their most abundant naturally occuring form (also called reference states).

Enthalpy of Combustion, :

It is the enthalpy change when one mole of the substance undergo complete combustion to give combustion products.

Enthalpy changes during phase transformations

Bond Enthalpies (Bond energies),

Ionisation Enthalpy

Electron Gain Enthalpy (DegH)