What is the change in internal energy of a system if 200 J of heat is added and
Practice Questions
Q1
What is the change in internal energy of a system if 200 J of heat is added and 50 J of work is done by the system?
150 J
250 J
200 J
100 J
Questions & Step-by-Step Solutions
What is the change in internal energy of a system if 200 J of heat is added and 50 J of work is done by the system?
Step 1: Understand the first law of thermodynamics, which 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).
Step 2: Identify the values given in the question: Q = 200 J (heat added) and W = 50 J (work done by the system).
Step 3: Substitute the values into the formula: ΔU = Q - W.
Step 4: Calculate the change in internal energy: ΔU = 200 J - 50 J.
Step 5: Perform the subtraction: 200 J - 50 J = 150 J.
Step 6: Conclude that the change in internal energy of the system is 150 J.
