Worksheets1st Law of Thermodynamics Check
Total questions: 10
Worksheet time: 20mins
Which of the following is/are statements of the 1st Law of Thermodynamics?
ΔE = q + w
Heat and work are forms of energy
Energy cannot be created nor destroyed, it can only be transformed.
Total energy is always zero.
If q = 1100 J and w = 300 J for a given system, what is the change in internal energy for the system?
+1400 J
+ 800 J
- 800 J
- 1400 J
What does ΔE stand for in the equation, ΔE = q + w ?
Change in Entropy
Change in Element
Change in Internal Energy
Change in Free Energy
A gas absorbs 500 J of heat and does 200 J of work. What is the change in internal energy of the gas?
+ 700 J
-700 J
- 300 J
+ 300 J
The internal energy of a system decreases by 40 J. What work is done by the gas if the system absorbs 150 J of heat?
- 110 J
+ 110 J
- 90 J
- 190 J
The internal energy of a gas increases by 50 J while the gas does 350 J of work. What can you say about the heat involved in the system?
The gas releases 300 J of heat.
The gas absorbs 300J of heat.
The gas absorbs 400 J of heat.
The system releases 400 J of heat.
If 600 J of heat is needed to increase the internal energy of a system from 15 J to 45 J. What amount of work will the system need to do on its surroundings?
630 J
570 J
660 J
540 J
The total amount of energy of a gas increases by 125 J as the gas does 40 J of work on its surroundings. Is the process exothermic?
Yes
No
Not enough information given.
Given that 1 calorie = 4.184 J
How many calories is 1234 J?
294.9 J
5163 J
0.003391 J
1238 J
Given that 1 calorie = 4.184 J
How many J is 1234 calories?
0.003391 J
1238 J
294.9 J
5163 J
