When does the systems at different temperature attained thermal equilibrium after time goes on ?

How to get thermal equilibrium in the system ?

When two non reactive samples at different temperatures are mixed in an isolated container of negligible heat capacity the final temperature of the mixture can be:

Give the characteristics of thermal equilibrium of two system.

Assertion: The heat supplied to a system is always equal to the increase in its internal energy. Reason: When a system changes from one thermal equilibrium to another some heat is absorbed by it.

When does a body (system) have different centre of gravity and centre of mass?

Two cylinders A and B of equal capacity are connected to each other via a stopcock. A contains a gas at standard temperature and pressure. B is completely evacuated. The entire system is thermally insulated. The stopcock is suddenly opened. Answer the following: (a) What is the final pressure of the gas in A and B ? (b) What is the change in internal energy of the gas ? (c) What is the change in the temperature of the gas ? (d) Do the intermediate states of the system (before settling to the final equilibrium state) lie on its P-V-T surface ?

Two thermally insulated vessel 1 and 2 are filled with air at temperature (T_1T_2), volume (V_1V_2) and pressure (P_1P_2) respectively. If the valve joining the two vessels is opened, the temperature inside the vessel at equilibrium will be

Assertion: Thermocouple acts as a heat engine. Reason: When two junctions of thermcouple are at different temperature, thermo emf is produced.

Assertion: When temperature of cold junction of a thermocouple is lowered, the value of neutral temperature of this thermo couple is raised. Reason: When the difference of temperature of two junction is raised. More thermo emf is produced.