Define or explain the following a Moving Boundary work b Spe

Define or explain the following: a. Moving Boundary work b. Specific heat c. Microscopic properties d. Incompressible substance e. The zeroth law of thermodynamics f. Polytropic process

Solution

a : Moving boundary work occurs when the boundary of the system moves as the system is expanded or compressed.When the system remains infinitesimally close to an equilibrium state time. If P=f(V) graph is drawn, the area under the graph (process curve) is equal in magnitude to the work done.

b.The specific heat is the amount of heat per unit mass required to raise the temperature by one degree Celsius.

c. Microscopic ( or statistical thermodynamics):

D : A substance is said to be incompressible if its specific volume is not dependent on pressure.

E :   When a body A is in thermal equilibrium with a body B, and also separately with a body C, then B and C will be in thermal equilibrium with each other. This is the zeroth law of thermodynamics.

F: It is an genralised process for compression and expansion without any restrictions ( Isothermal or Adibatic etc.)