I hope you can understand this and i hope this helps.
Speed increases with increasing temperature. Gas molecule speed follows the formula
v(average) = 8RT/(pi*M), where
M = molar mass (e.g., 0.002 kg/mole for hydrogen)
R = universal gas constant = 8.314472 J/(mole-degK)
T = temperature K
The ref. gives the derivation of this formula and other formulas for v(RMS) and v(most probable).If u dont understand i can make it simpler just ask.