Question

introduction for chemical engineering thermodynamics

Answer 1

Thermodynamics:the study of motion due to generation of heat

*it is a branch of science which deals about enenrgy and Thermodynamics also depends on the properties of a substance and change of these properties as a results of energy transformation

*NOTE:heat is a low gradiable energy or disorganised form of energy where work is a high gradiable energy or organised form of energy

AIM:To convert the disorganised form of energy (heat) into organised form of energy (work) in efficient manner

*heat is transfered from higher temperature to lower temperature up to thermal equilibrium.Thermodynamics does not give how much time to reach thermal equiibrium

LAWS OF THERMODYNAMICS :

ZEROTH LAW:defination of temperature

statement:when a body A is in thermal equilibrium with body B is in thermal equilibrium with body C . Then A and C are set to be in thermal equilibrium with each other

FIRST LAW:for a closed system undergoing a thermodynamic cycle the net heat transfer is equal to the net work transfer is also known as quantitative law .simply says that the energy is conserved it does not give any direction for a particular process

SECOND LEW :which gives the direction of particular process based on concepy of entropyand it is also known as direction's law or qualitative law

THIRD LAW:All processes seases as the temperature approches zero means absolute entropy

*The main difference between thermodynamics and heat transfer is that thermodynamics deals with the system in the thermodynamic equilibrium where as heat transfer deals with what rate the change of the state occurs

*any region or part on which we try to focus or concentrate is known as thermodynamic system and any thing externai to the system is known as surrounding

LIMITATIONS:

*Thermodynamics did not discuss how ong the process will occur

*Thermodynamics did not discuss about the modes of heat transfer

*Thermodynamics did not discuss about the internal heat generation