Question

write the three laws of thermodynamics

Answer 1

The four laws of thermodynamics are as follows :
1) Zeroth LawThe zeroth law of thermodynamics can be summarized as follows:
(a) Two bodies at different temperature in thermal contact with each other tend to move towards the same temperature
(b) Two bodies which are separately in thermal equilibrium with a third body, are in thermal equilibrium with each other.For example hot water when kept in open becomescold after sometime and attains the temperature of surroundings.
2) First law of thermodynamicsThe first law of thermodynamics states thatthe energy of an isolated system is constant.ΔU = q + W, is the mathematical statement of the first law of thermodynamics.where ΔU is the change in the internal energy of the system, q is the heat transferred and W is the work done. It basically means that energy can neither be created nor be destroyed, although it can be converted from one form to another.
3) Second law The second law of thermodynamics states thatfor a spontaneous change inan isolated system, the change in entropy is positive. The entropy is a measure of degree of randomness in system. For example water spontaneously changes from ice in solid state to water in liquid state to steam in gaseous state because the degree of randomness (or entropy) is the maximum in gaseous state.
4) Third Law -The third law of thermodynamics states thatthe entropy of a perfectly crystalline substance approaches zero as the absolute zero of temperature is reached.At lower temperature, the energy of the molecules would be less. Hence the translational, rotational and vibrational motion of the molecules would be restricted because of which their entropy would be less and approach zero at extremely low temperature (close to zero).

Answer 2

The first law states that energy can neither be created nor be destroyed..it can only be transferred from one form to another..

The second law states that the entropy of an isolated system not in equilibrium will increase over time, approaching a maximum value at equilibrium..

The third law states that as temperature reaches zero, the entropy of an isolated system reaches a constant minimum... 


Hope this helps
Please mark as brainliest