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If a gas expands against a constant external pressure, the work done by the gas
If a gas expands against a constant external pressure, the work done by the gas is given by:
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Practice Questions
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Q1
If a gas expands against a constant external pressure, the work done by the gas is given by:
W = P_ext * ΔV
W = ΔU + Q
W = Q - ΔU
W = P_ext / ΔV
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The work done by the gas during expansion against a constant external pressure is given by W = P_ext * ΔV.
Questions & Step-by-step Solutions
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Q
Q: If a gas expands against a constant external pressure, the work done by the gas is given by:
Solution:
The work done by the gas during expansion against a constant external pressure is given by W = P_ext * ΔV.
Steps: 5
Show Steps
Step 1: Understand that when a gas expands, it pushes against something (the external pressure).
Step 2: Recognize that the work done by the gas is related to how much it expands (this is called ΔV, or change in volume).
Step 3: Know that the external pressure (P_ext) is the constant pressure the gas is pushing against during its expansion.
Step 4: Combine these ideas into the formula: Work (W) is equal to the external pressure (P_ext) multiplied by the change in volume (ΔV).
Step 5: Write the formula as W = P_ext * ΔV to express the work done by the gas.
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