WorksheetsFirst Law of Thermodynamics
Total questions: 10
Worksheet time: 5mins
1200 J of heat are added to a sample of gas while 400 J of work is done by the gas. What is the change in internal energy of the gas?
800 J
1600 J
-800 J
-1600 J
500 J of energy is applied to a gas, if 200J of work is done by the gas. What is the change of internal energy in calories?
300cal
71.7cal
700cal
167.4cal
The internal energy of a system decreases by 40cal. What work is done by the gas, if the system absorbs 150J of heat?
317.2J
17.2J
190J
110J
The internal energy of a system increases by 50cal while 350J of work is done by a gas. Determine the change in heat .
559J
400J
141J
300J
if 600J of heat is needed to increase the internal energy from 15cal to 45cal. What work will the system produce?
474.6J
570J
535.4J
630J
40J of work is done by a gas when the system has an increase in internal energy of 125J. What energy is needed to do so?
165J
85J
Can´t be possible
165Cal
An ideal gas undergoes the thermodynamic changes represented in the P –V diagram below
(P → Q → R → P).
Which of the following is the net work done by the gas in a cycle?
4.5 × 105 J
3.0 × 105 J
1.0 × 105 J
Zero
The diagram shows the pressure-volume relationship for a fixed mass of an ideal gas that undergoes a cycle XYZ.
In which part(s) of the cycle is external work done on the gas?
Y → Z only
Y → Z and Z → X only
X → Y and Z → X only
X → Y only
The diagram shows the pressure–volume (PV) relationship for a gas.
Which of the following area(s) is/are equal to the work done by the gas as it expands?
area I
area II
area I + area II
area I – area II
