The electron gain enthalpy of chlorine is -349 kJ mol-1. How much energy in kJ is released when 3.55g of chlorine is converted completely into Cl- ion in the gaseous state
Answers
34.9 kJ energy is released when 3.55g of chlorine is converted completely into Cl- ion in the gaseous state.
Given : The electron gain enthalpy of chlorine is -349 kJ/mol.
To find : The amount of energy in kJ is released when 3.55 g of chlorine is converted completely into Cl¯ ion in the gaseous state.
Solution : before solving this question, let's understand what is the meaning of electron gain enthalpy.
electron gain enthalpy is the energy released when an electron is added in an isolated gaseous atom.
a/c to question, electron gain enthalpy of chlorine is -349 kJ/mol.
it means, 349 kJ energy is released when 1 mole of chlorine is converted into Cl¯ ion in the gaseous state.
so energy released when 3.55g of chlorine is converted into Cl¯ ion , E = 349 × no of moles of Cl
= 349 × (3.55g/35.5g/mol)
= 34.9 kJ
Therefore 34.9 kJ energy is released when 3.55g of chlorine is converted completely into Cl- ion in the gaseous state.
Answer:
9.83 kJ
Explanation:
Refer attachment.
