1
AIPMT 2012 Prelims
+4
-1
One mole of an ideal gas goes from an initial state A to final state B via two processes : It first undergoes isothermal expansion from volume V to 3V and then its volume is reduced from 3V to V at constant pressure. The correct P-V diagram representing the two process is
A
B
C
D
2
AIPMT 2012 Prelims
+4
-1
A thermodynamic system is taken through the cycle ABCD as shown in figure. Heat rejected by the gas during the cycle is

A
2PV
B
4PV
C
$${1 \over 2}$$ PV
D
PV
3
AIPMT 2011 Mains
+4
-1
A mass of diatomic gas $$(\gamma = 1.4)$$ at a pressure of 2 atmospheres is compressed adiabatically so that its temperature rises from 27oC to 927oC. The pressure of the gas in the final state is
A
8 atm
B
28 atm
C
68.7 atm
D
256 atm
4
AIPMT 2011 Prelims
+4
-1
During an isothermal expansion, a confined ideal gas does $$-$$ 150 J of work against its surroundings. This implies that
A
150 J of heat has been removed from the gas
B
300 J of heat has been added to the gas
C
no heat is transferred because the process is isothermal
D
150 J of heat has been added to the gas
EXAM MAP
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