ENERGY BALANCE
UNIT V
ENERGY BALANCE
• Heat capacity of solids, liquids, gases and
solutions, Use of mean heat capacity in heat
calculations,
• Problems involving sensible heat and latent heats,
Evaluation of enthalpy.
• Standard heat of reaction, heat of formation,
combustion, solution, mixing etc.,
• Calculation of standard heat of reaction,
• Effect of pressure and temperature on heat of
reaction.
• Unsteady state energy balances.
COURSE OUTCOMES
Perform energy balance calculations
for various processes in Chemical
Engineering.
Energy Balance
Physical or Chemical changes in matter ~ accompanied by Enthalpy changes
Energy Balance
In chemical reaction ~ change in enthalpy always occurs
Energy Balance
Energy level diagrams of Exothermic and Endothermic Reaction
Energy Balance
.
Energy Balance
Energy Balance
Work done increases the Potential Energy
Energy Balance
Potential Energy → Kinetic Energy
Energy Balance
Loss of work done → Thermal Energy
Energy Balance
Reaction → Chemical Energy
Energy Balance
Mechanical work done → Electrical Energy
Energy Balance
Mechanical work → Energy
Energy Balance
Energy → Mechanical work
Energy Balance
Unit of Work = Unit of Energy
Energy Balance
Energy Balance
Aim of Thermochemistry
Energy Balance
Terminology in Thermochemistry
Energy Balance
First Law of Thermodynamics:
“Energy can neither be created nor destroyed
during a process although it can be converted
from one form to another.”
(or)
“The total energy of an isolated system and its
surrounding remains constant.”