Why is the room warm

Imagine coming into a nice, warm room after walking outside in the snow. We instantly feel warmer, because the room is warmer. But what exactly is the energy content of the room Stated another way, how much energy do we get from the air in the room by virtue of it being at its own particular temperature  

For simplicity, we will consider only the molecules of gas. Each molecule of gas will have kinetic energy (the energy of movement) unless the temperature is absolute zero. This energy may be transferred through inelastic molecules collisions. But how much kinetic energy does the gas have  

Provided we know the temperature of the gas, we know its energy - the energy it has simply by existing at the temperature T. 

Worked Example 1.6 What is the energy of 1 mol of gas in a warm room at 310 K  

The molar energy of these molecules is about 4 kJ mol 1, which is extremely slight compared with the energy of the bonds connecting the respective atoms within a molecule (see Chapters 2 and 3). There is little chance of this room energy causing bonds to break or form. 

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