InterviewSolution
| 1. |
Differentiate heat and temperature on the basis of kinetic theory of molecules. |
|
Answer» heat energy of an object is the SUM of all the kinetic energies of the molecules of the object (upto constant factor). The temperature on the other hand is the AVERAGE of the kinetic energies of all the molecules of the object. Now when ice is melting at 0 degrees Celsius, the temperature as measured on a thermometer does not go up. The common explanation is that any heat being absorbed by the ice is being used to break the somewhat strong solid solid bonds between the molecules of the ice. Heat is not a property of a system. Heat is a process function. Temperature is a property of a system because is a state function. For instance, the state of a simple gas is given by temperature, pressure, and composition(T,p,N)(T,p,N).Temperature is defined as the inverse ratio of variation of entropySSto changes in internal energyU |
|