If a system absorbs 200 J of heat and does 50 J of work, what is the change in internal energy?
Practice Questions
1 question
Q1
If a system absorbs 200 J of heat and does 50 J of work, what is the change in internal energy?
150 J
250 J
200 J
50 J
Using the First Law of Thermodynamics, ΔU = Q - W = 200 J - 50 J = 150 J.
Questions & Step-by-step Solutions
1 item
Q
Q: If a system absorbs 200 J of heat and does 50 J of work, what is the change in internal energy?
Solution: Using the First Law of Thermodynamics, ΔU = Q - W = 200 J - 50 J = 150 J.
Steps: 6
Step 1: Identify the heat absorbed by the system, which is given as 200 J. This is represented as Q.
Step 2: Identify the work done by the system, which is given as 50 J. This is represented as W.
Step 3: Use the formula from the First Law of Thermodynamics, which states that the change in internal energy (ΔU) is equal to the heat absorbed (Q) minus the work done (W).
Step 4: Substitute the values into the formula: ΔU = Q - W = 200 J - 50 J.
Step 5: Calculate the result: 200 J - 50 J = 150 J.
Step 6: Conclude that the change in internal energy (ΔU) is 150 J.
