Physics-
General
Easy
Question
Three processes compose a thermodynamics cycle shown in the PV diagram. Process 
takes place at constant temperature. Process 
takes place at constant volume, and process 
is adiabatic. During the complete cycle, the total amount of work done is 10 J. During process , the internal energy decrease by 20J and during process , 20 J of work is done on the system. How much heat is added to the system during process ?
- 0
- 10 J
- 20 J
- 30 J
The correct answer is: 30 J
Related Questions to study
physics-
Two identical vessels A & B contain equal amount of ideal monoatomic gas. The piston of A is fixed but that of B is free. Same amount of heat is absorbed by A & B. If B's internal energy increases by 100 J the change in internal energy of A is
Two identical vessels A & B contain equal amount of ideal monoatomic gas. The piston of A is fixed but that of B is free. Same amount of heat is absorbed by A & B. If B's internal energy increases by 100 J the change in internal energy of A is
physics-General
physics-
A gas takes part in two processes in which it is heated from the same initial state 1 to the same final temperature. The processes are shown on the P-V diagram by the straight line 1-2 and 1-3. 2 and 3 are the points on the same isothermal curve. Q1 and Q2 are the heat transfer along the two processes. Then
A gas takes part in two processes in which it is heated from the same initial state 1 to the same final temperature. The processes are shown on the P-V diagram by the straight line 1-2 and 1-3. 2 and 3 are the points on the same isothermal curve. Q1 and Q2 are the heat transfer along the two processes. Then
physics-General
physics-
A ideal monoatomic gas is carried around the cycle ABCDA as shown in the fig. The efficiency of the gas cycle is
A ideal monoatomic gas is carried around the cycle ABCDA as shown in the fig. The efficiency of the gas cycle is
physics-General
physics-
Three processes form a thermodynamic cycle as shown on P-V diagram for an ideal gas Process 1 → 2 takes place at constant temperature (300K).Process takes place at constant volume During this process 40J of heat leaves the system Process is adiabatic and temperature T3 is 275K. Work done by the gas during the process
is
Three processes form a thermodynamic cycle as shown on P-V diagram for an ideal gas Process 1 → 2 takes place at constant temperature (300K).Process takes place at constant volume During this process 40J of heat leaves the system Process is adiabatic and temperature T3 is 275K. Work done by the gas during the process
is
physics-General
physics-
A thermodynamic cycle takes in heat energy at a high temperature and rejects energy at a lower temperature. If the amount of energy rejected at the low temperature is 3 times the amount of work done by the cycle, the efficiency of the cycle is
A thermodynamic cycle takes in heat energy at a high temperature and rejects energy at a lower temperature. If the amount of energy rejected at the low temperature is 3 times the amount of work done by the cycle, the efficiency of the cycle is
physics-General
physics-
The figure, shows the graph of logarithmic reading of pressure and volume for two ideal gases A and B undergoing adiabatic process. From figure it can be concluded that
The figure, shows the graph of logarithmic reading of pressure and volume for two ideal gases A and B undergoing adiabatic process. From figure it can be concluded that
physics-General
physics-
An ideal gas is taken from point A to point C on P-V diagram through two process AOC and ABC as shown in the figure. Process AOC is isothermal
An ideal gas is taken from point A to point C on P-V diagram through two process AOC and ABC as shown in the figure. Process AOC is isothermal
physics-General
physics-
Pressure versus temperature graph of an ideal gas is shown in figure
Pressure versus temperature graph of an ideal gas is shown in figure
physics-General
physics-
In the above thermodynamic process, the correct statement is
In the above thermodynamic process, the correct statement is
physics-General
physics-
An ideal gas undergoes the process 1 
2 as shown in the figure, the heat supplied and work done in the process is 
and 
respectively. The ratio 
is
An ideal gas undergoes the process 1 2 as shown in the figure, the heat supplied and work done in the process is and respectively. The ratio is
physics-General
physics-
A given mass of a gas expands from a state A to the state B by three paths 1, 2 and 3 as shown in T-V indicator diagram. If W1, W2 and W3 respectively be the work done by the gas along the three paths, then
A given mass of a gas expands from a state A to the state B by three paths 1, 2 and 3 as shown in T-V indicator diagram. If W1, W2 and W3 respectively be the work done by the gas along the three paths, then
physics-General
physics-
At temperature T, N molecules of gas A each having mass m and at the same temperature 2N molecules of gas B each having mass 2m are filled in a container. The mean sqaure velocity of molecules of gas B is v2 and mean square of x component of velocity of molecules of gas A is w2. The ratio of w2/v2 is :
At temperature T, N molecules of gas A each having mass m and at the same temperature 2N molecules of gas B each having mass 2m are filled in a container. The mean sqaure velocity of molecules of gas B is v2 and mean square of x component of velocity of molecules of gas A is w2. The ratio of w2/v2 is :
physics-General
physics-
One mole of an ideal diatomic gas is taken through the cycle as shown in the figure
1) 2 : isochoric process
2) 3 : straight line on P-V diagram
3) 1 : isobaric process
The average molecular speed of the gas in the states 1, 2 and 3 are in the ratio
One mole of an ideal diatomic gas is taken through the cycle as shown in the figure
1) 2 : isochoric process
2) 3 : straight line on P-V diagram
3) 1 : isobaric process
The average molecular speed of the gas in the states 1, 2 and 3 are in the ratio
physics-General
physics-
One mole of a gas expands obeying the relation as shown in the P/V diagram. The maximum temperature in this process is equal to
One mole of a gas expands obeying the relation as shown in the P/V diagram. The maximum temperature in this process is equal to
physics-General
physics-
A barometer tube, containing mercury, is lowered in a vessel containing mercury until only 50 cm of the tube is above the level of mercury in the vessel. If the atmospheric pressure is 75 cm of mercury, what is the pressure at the top of the tube?
A barometer tube, containing mercury, is lowered in a vessel containing mercury until only 50 cm of the tube is above the level of mercury in the vessel. If the atmospheric pressure is 75 cm of mercury, what is the pressure at the top of the tube?
physics-General
