If 1000 J of heat is added to a gas and it expands doing 400 J of work, what is
Practice Questions
Q1
If 1000 J of heat is added to a gas and it expands doing 400 J of work, what is the change in internal energy? (2023)
600 J
400 J
1000 J
200 J
Questions & Step-by-Step Solutions
If 1000 J of heat is added to a gas and it expands doing 400 J of work, what is the change in internal energy? (2023)
Step 1: Identify the amount of heat added to the gas, which is 1000 J. This is represented as Q.
Step 2: Identify the amount of work done by the gas during expansion, which is 400 J. This is represented as W.
Step 3: Use the first law of thermodynamics formula: ΔU = Q - W, where ΔU is the change in internal energy.
Step 4: Substitute the values into the formula: ΔU = 1000 J - 400 J.
Step 5: Calculate the result: ΔU = 600 J.
First Law of Thermodynamics – The first law states that the change in internal energy (ΔU) of a system is equal to the heat added to the system (Q) minus the work done by the system (W).
