Heat is associated with
a) kinetic energy of random motion of molecules
b) kinetic energy of orderly motion of molecules
c) total kinetic energy of random and orderly motion of molecules
d) kinetic energy of random motion in some cases and kinetic energy of orderly motion in other
The answer is the option (a) kinetic energy of random motion of molecules.
Explanation: Kinetic energy associated with random motion of molecules increases as vibration of molecules about their mean position increases on increasing temperature.