H2 Physics 13 - Thermodynamic Systems: First Law Applied to an Ideal Gas
What you will learn
- A fixed 0.25 mol of monatomic ideal gas is heated quasistatically at constant pressure from 300 K to 500 K, with only pressure-volume work. Find heat Q supplied to the gas, work W done by the gas, and the internal-energy change delta U.
- Work at constant pressure: W = p delta V = n R delta T = 0.25 x 8.31 x 200 = about 416 J.
- Monatomic internal energy change: delta U = 3/2 n R delta T = about 623 J.
The displayed transcript corrects the molar-heat-capacity substitution at 01:46.833, retaining the unrounded value to obtain 1038.75 J. The original audio and on-screen content are unchanged.
Continue H2 Physics Thermodynamics Notes: First Law, p-V Work, Heat Capacity | 9478
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