For an isothermal change , total amount of heat of the system does not remain constant .

Why voltage across zener diode does not remain strictly constant ?

Assertion : If there is no external torque on a body about its centre of mass, then the velocity of the centre of mass remains constant. Reason : The linear momentum of an isolated system remains constant.

Justify following statements as true or false. Total amount of energy in the universeatays remains const.

When the temperature of a system is incresed or decreased in an adiabatic heating or cooling , is there any transfer of heat to the system or from the system ?

The heat or reaction does not depend upon :

When water boils, why does its temperature remain constant?

If the amount of heat given to a system be 35 joules and the amount of work done by the system be -15 joules , then the change in the internal energy of the system is

The amount of heat required to change temperature of a substance is

Work done per mol in an isothermal change is

What is the relation between change in internal energy of the system and heat energy supplied to the system or heat extracted from the system?