Adiabatic process and the Carnot cycle
Answers are for parents and teachers.
1
An engine takes 2000 J and gives 1500 J to the cooler. What is the efficiency (%)?
25
2
A Carnot engine: heater 227 °C, cooler 27 °C. What is the efficiency (%)? (T = t + 273)
40
3
A machine with efficiency 30% takes 1000 J from the heater. What is the useful work (J)?
300
4
A Carnot engine has efficiency 50% and T₂ = 300 K. What is T₁ (K)?
600
5
Why does a gas heat up when compressed quickly?
Heat has no time to escape; the work of compression raises the internal energy (A = –ΔU).