B.4.1 (HL)—First law of thermodynamics Topic Practice
B.4.1 (HL)—First law of thermodynamics Topic Practice
Practise first-law questions by tracking heat transfer, work and internal energy through each gas process with consistent sign choices.
How this is tested
- use `Delta U=Q-W` or the stated convention to calculate internal energy from heat and work values
- use a process label such as isothermal or adiabatic to set `Delta U` or `Q` before finding the other term
- complete a cycle table by assigning `+`, `-` or `0` to `Q`, `W` and `Delta U` for each stage