Concept Videos :-

#16 | Internal Energy (U) of Gas
#17 | Solved Example: 5
#18 | Solved Example: 6
#31 | First Law
#32 | Application of First Law to Adiabatic Process
#33 | Application of First Law to IsoThermal Process
#34 | Solved Example: 14
#35 | Application of First Law to Isochoric & Cyclic Processes
#36 | Solved Example: 15
#37 | Differential Form of First Law

Concept Questions :-

First law of thermodynamics
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Complete Question Bank

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Figure below shows two paths that may be taken by a gas to go from a state A to a state C. In process AB, 400 J of heat is added to the system and in process BC, 100 J of heat is added to the system. The heat absorbed by the system in the process AC will be-


(a) 380 J 
(b) 500 J
(c) 460 J
(d) 300 J

Concept Videos :-

#16 | Internal Energy (U) of Gas
#17 | Solved Example: 5
#18 | Solved Example: 6
#31 | First Law
#32 | Application of First Law to Adiabatic Process
#33 | Application of First Law to IsoThermal Process
#34 | Solved Example: 14
#35 | Application of First Law to Isochoric & Cyclic Processes
#36 | Solved Example: 15
#37 | Differential Form of First Law

Concept Questions :-

First law of thermodynamics
To view Explanation, Please buy any of the course from below.
Complete Question Bank + Test Series
Complete Question Bank

Difficulty Level:


A thermodynamic system is taken through the cycle ABCD as shown in figure. Heat rejected by the gas during the cycle is 

(a)2 pV                                     (b)4 pV

(c)12pV                                    (d)pV

Concept Videos :-

#16 | Internal Energy (U) of Gas
#17 | Solved Example: 5
#18 | Solved Example: 6
#31 | First Law
#32 | Application of First Law to Adiabatic Process
#33 | Application of First Law to IsoThermal Process
#34 | Solved Example: 14
#35 | Application of First Law to Isochoric & Cyclic Processes
#36 | Solved Example: 15
#37 | Differential Form of First Law

Concept Questions :-

First law of thermodynamics
To view Explanation, Please buy any of the course from below.
Complete Question Bank + Test Series
Complete Question Bank

Difficulty Level:


An ideal gas goes from state A to state B

via three different processes as indicated 

in the p-V diagram

If Q1, Q2, Q3 indicates the heat absorbed

by the gas along the three processes and 

U1, U2, U3 indicates the change in 

internal energy along the three processes

respectively, then

(a) Q1>Q2>Q3 and U1= U2= U3

(b) Q3>Q2>Q1 and U1= U2= U3

(c) Q1=Q2=Q3 and U1>U2>U3

(d) Q3>Q2>Q1 and U1>U2>U3

Concept Videos :-

#16 | Internal Energy (U) of Gas
#17 | Solved Example: 5
#18 | Solved Example: 6
#31 | First Law
#32 | Application of First Law to Adiabatic Process
#33 | Application of First Law to IsoThermal Process
#34 | Solved Example: 14
#35 | Application of First Law to Isochoric & Cyclic Processes
#36 | Solved Example: 15
#37 | Differential Form of First Law

Concept Questions :-

First law of thermodynamics
To view Explanation, Please buy any of the course from below.
Complete Question Bank + Test Series
Complete Question Bank

Difficulty Level:


The internal energy change in a system that has absorbed 2 kcal of heat and done 500 J of work is 

(a) 8900 J                                      (b) 6400 J

(c) 5400 J                                      (d) 7900 J

Concept Videos :-

#16 | Internal Energy (U) of Gas
#17 | Solved Example: 5
#18 | Solved Example: 6
#31 | First Law
#32 | Application of First Law to Adiabatic Process
#33 | Application of First Law to IsoThermal Process
#34 | Solved Example: 14
#35 | Application of First Law to Isochoric & Cyclic Processes
#36 | Solved Example: 15
#37 | Differential Form of First Law

Concept Questions :-

First law of thermodynamics
To view Explanation, Please buy any of the course from below.
Complete Question Bank + Test Series
Complete Question Bank

Difficulty Level:


A system performs work ΔW when an amount of heat is ΔQ added to the system, the corresponding change in the internal energy is ΔU. A unique function of the initial and final states (irrespective of the mode of change) is -

(1) ΔQ

(2) ΔW

(3) ΔU and ΔQ

(4) ΔU

Concept Videos :-

#16 | Internal Energy (U) of Gas
#17 | Solved Example: 5
#18 | Solved Example: 6
#31 | First Law
#32 | Application of First Law to Adiabatic Process
#33 | Application of First Law to IsoThermal Process
#34 | Solved Example: 14
#35 | Application of First Law to Isochoric & Cyclic Processes
#36 | Solved Example: 15
#37 | Differential Form of First Law

Concept Questions :-

First law of thermodynamics
To view Explanation, Please buy any of the course from below.
Complete Question Bank + Test Series
Complete Question Bank

Difficulty Level:


A container of volume 1m3 is divided into two equal compartments by a partition. One of these compartments contains an ideal gas at 300 K. The other compartment is vaccum. The whole system is thermally isolated from its surroundings. The partition is removed and the gas expands to occupy the whole volume of the container. Its temperature now would be -

(1) 300 K

(2) 239 K

(3) 200 K

(4) 100 K

Concept Videos :-

#16 | Internal Energy (U) of Gas
#17 | Solved Example: 5
#18 | Solved Example: 6
#31 | First Law
#32 | Application of First Law to Adiabatic Process
#33 | Application of First Law to IsoThermal Process
#34 | Solved Example: 14
#35 | Application of First Law to Isochoric & Cyclic Processes
#36 | Solved Example: 15
#37 | Differential Form of First Law

Concept Questions :-

First law of thermodynamics
To view Explanation, Please buy any of the course from below.
Complete Question Bank + Test Series
Complete Question Bank

Difficulty Level:


110 J of heat is added to a gaseous system, whose internal energy change is 40 J, then the amount of external work done is 

(1) 150 J

(2) 70 J

(3) 110 J

(4) 40 J

Concept Videos :-

#16 | Internal Energy (U) of Gas
#17 | Solved Example: 5
#18 | Solved Example: 6
#31 | First Law
#32 | Application of First Law to Adiabatic Process
#33 | Application of First Law to IsoThermal Process
#34 | Solved Example: 14
#35 | Application of First Law to Isochoric & Cyclic Processes
#36 | Solved Example: 15
#37 | Differential Form of First Law

Concept Questions :-

First law of thermodynamics
To view Explanation, Please buy any of the course from below.
Complete Question Bank + Test Series
Complete Question Bank

Difficulty Level:


When the amount of work done is 333 cal and change in internal energy is 167 cal, then the heat supplied is -

(1) 166 cal

(2) 333 cal

(3) 500 cal

(4) 400 cal

Concept Videos :-

#16 | Internal Energy (U) of Gas
#17 | Solved Example: 5
#18 | Solved Example: 6
#31 | First Law
#32 | Application of First Law to Adiabatic Process
#33 | Application of First Law to IsoThermal Process
#34 | Solved Example: 14
#35 | Application of First Law to Isochoric & Cyclic Processes
#36 | Solved Example: 15
#37 | Differential Form of First Law

Concept Questions :-

First law of thermodynamics
To view Explanation, Please buy any of the course from below.
Complete Question Bank + Test Series
Complete Question Bank

Difficulty Level:


First law thermodynamics states that

(1) System can do work

(2) System has temperature

(3) System has pressure

(4) Heat is a form of energy

Concept Videos :-

#16 | Internal Energy (U) of Gas
#17 | Solved Example: 5
#18 | Solved Example: 6
#31 | First Law
#32 | Application of First Law to Adiabatic Process
#33 | Application of First Law to IsoThermal Process
#34 | Solved Example: 14
#35 | Application of First Law to Isochoric & Cyclic Processes
#36 | Solved Example: 15
#37 | Differential Form of First Law

Concept Questions :-

First law of thermodynamics
To view Explanation, Please buy any of the course from below.
Complete Question Bank + Test Series
Complete Question Bank

Difficulty Level: