WHAT IS ENTHALPY???
  ANS: ENTHALPY IS THE ENERGY OF PARTICLES IT CANNOT BE MEASURED DIRECTLY HOWEVER  THEY CAN BE MEASURED IF THERE IS ANY VARIANCE. IT IS GIVEN BY THE FORMULA H=dU+PV WHERE U IS THE INTERNAL ENERGY AND PV IS THE FLOW ENERGY.


WHAT IS ENTROPY??
     ANS:IT IS THE MEASURE OF DISORDERNES OF A SYSTEM...IN A SOLID THE ATOMS ARE ARRANGED ORDERLY HENCE THE ENTROPY VALUE WILL BE LESS

WHAT IS SPECIFIC HEAT?? THE HEAT ENERGY REQUIRED TO RAISE THE TEMPERATURE OF UNIT MASS BY 1 DEG CELCIUS