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To raise the temperature of a certain mass of gas by `50^(@)C` at a constant pressure , 160 calories of heat is required . When the sam mass of gas is cooled by `100^(@)C` at constant volume 240 calories of heat is released . How many degrees of freedom does each molecule of this gas have (assume gas to be ideal) ?

A

7

B

5

C

6

D

3

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