In a given process of an ideal gas, dW = 0 and dQ < 0. Then for the gas which of the following will occur ?
The temperature will decrease
The volume will increase
The pressure will remain constant
The temperature will increase
An ideal monoatomic gas is taken round the cycle ABCDA as shown in the P-V diagram.
PV
2 PV
PV / 2
zero
In an adiabatic system which is true ?
PγTγ -1 = constant
PγT1-γ = constant
PTγ = constant
P1-γTγ = constant
The efficiency of a Carnot engine operating between temperatures of 100oC and -23oC will be
A thermodynamic system is taken through the cycle PQRSP process. The net work done by the system is :
20 J
-20 J
400 J
-374 J
A Carnot engine whose sink is at 300 K has an efficiency of 40%. By how much should the temperature of source be increased so as to increase its efficiency by 50% of original efficiency?
275 K
325 K
250 K
380 K
An ideal gas heat engine is operating between 227oC and 127oC. It absorbs 104 J of heat at the higher temperature. The amount of heat converted into work is:
2000 J
4000 J
8000 J
5600 J
A thermodynamic process is shown in the figure. The pressure and volumes corresponding to some points in the figure are
PA = 3 × 104 Pa, VA = 2 × 10-3 m3
PB = 8 × 104 Pa, VB = 5 × 10-3 m3
In process AB, 600 J of heat is added to the system and in process BC, 200 J of heat is added to the system. The change in internal energy of the system in process AC would be
560 J
800 J
600 J
640 J
Universal gas constant is:
CP - CV
CP + CV
Which of the following parameters does not characterize the thermodynamic state of matter ?
Temperature
Pressure
Work
Volume