Practical work and problems
Answers are for parents and teachers.
1
4 l of gas expands isothermally from 400 kPa to 100 kPa. What is the new volume (l)?
16
2
A room is 5 m × 4 m × 3 m. What is its volume in m³?
60
3
A gas of density 3 kg/m³ is at 300 K. If the temperature becomes 600 K at constant pressure, what is the density?
1.5 kg/m³
4
A gas in a closed vessel is heated from 27 °C to 87 °C. By what percent does the pressure rise? (300 K → 360 K)
20 %
5
Choose one law from Chapter I and explain it with a simple everyday example.
For example, leaving a bicycle tyre in hot sun: the volume is constant, so as T rises p rises (Charles’s law).