Why is the temperature of a system a state function?

Why is the internal energy of a system a state function?

Temperature is a state function or not?

Some properties of a system are state functions. q and W are not state functions. But (q+W) is a state function. Why?

Types of system | Properties of a System | State Function and Path Functions | Internal Energy

Assertion & Resson:Direction: Mark the correct choice as: Assertion: A system can be converted from one state to another state. Reason: If takes place when the temperature of the system is constant.

Statement-1: The internal energy of a system does not change when there is not change in temperature Statement-2: The internal energy of a gaseous system is state function.

Statement-1: The internal energy of a system does not change when there is not change in temperature Statement-2: The internal energy of a gaseous system is state function.

For any substance, Why does the temperature remain constant during the change of state?

Assertion : The heat of a reaction does not depend upon the temperature at which reaction is carried out. Reason : Temperature is a state function.

a) What is meant by state of the system and state variables? b) Give any four examples for state variables/state functions.