IB Physics HL B 3 7 Ideal Gas Internal Energy Questions

Practise IB Physics HL B.3.7 by analysing monatomic-gas internal energy, particle kinetic energy and temperature-dependent state changes.

Exam points

Apply conservation of mechanical energy when friction and other resistive forces are absent.
Calculate speed, height or elastic-energy changes by relating kinetic, gravitational potential and elastic stores using complete evidence.

[Maximum number: 2]

An ideal monatomic gas is kept in a container of volume $2.1 \times 10^{-4} \mathrm{~m}^{3}$ , temperature 310 K and pressure $5.3 \times 10^{5} \mathrm{~Pa}$ .

Calculate, in J , the internal energy of the gas.

For one atom $U=\frac{3}{2}kT$ $U=2.6\times10^{22}\times\frac{3}{2}\times1.38\times10^{-23}\times310=170\ \mathrm{J}$

All question bank results loaded

IB Physics HL B 3 7 Ideal Gas Internal Energy Questions question 1