Calculate the kinetic energy of CH4 at 215K.

Question

The root mean square was 578 m/s

Answer 1

KE = 1/2 mv²

KE = ?

m = 12 g + 4 g = 16 g = 0.016 kg

v = 578 m/s

KE = 1/2 (0.016 kg)(578 m/s)²

KE = 2672 kg m² s^-2 = 2672 Joules at 215K (note: KE will change with temperature b/c rms velocity changes)