1.

70 Calories of heat are required to raise the temperature of 2 moles at constant pressure from 30^(@)C" to "35^(@)C, what is the amount of heat required in calories to raise the same amount through same range at contant volume ? (gamma=1.4) :

Answer»

70
60
50
35

Solution :Here `(C_(p))/(C_(V))=1.4`
Now `nC_(p) xx DELTA T=70,`
`nxxC_(v)xxDelta T =Q`
`therefore (Q)/(70)=(C_(p))/(C_(v))=(10)/(14)" or "Q=(70xx10)/(14) =50` cals.
`therefore` Correct choice is (c ).


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