Question

Define enthalpy of chemical reactions. What is meant by standard state of a substance and standerd enthalpy of reactions?

Answer 1

Answer:

• when an electron is added maths a neutral gases atom to convert it into a negative ion the enthalpy change a company complaining the process is defined as electron gain enthalpy and electron gain enthalpy provides the measure of of the is with which an atom or an electron to form an anion.

Answer 2

Explanation:

Enthalpy of a substance is defined as the internal energy of the substance + pressure energy per unit mass of the substance. The reason for defining such kind of relationship is that under constant pressure system the change of this property (enthalpy) denotes the heat added or removed from the system.