Deepak Scored 45->99%ile with Bounce Back Crack Course. You can do it too!

# Use R=8.3 J/mol-K wherever required. Hydrogen gas is contained in a closed vessel

Question:

Use $\mathrm{R}=8.3 \mathrm{~J} / \mathrm{mol}-\mathrm{K}$ wherever required.

Hydrogen gas is contained in a closed vessel at $1 \mathrm{~atm}(100 \mathrm{kPa})$ and $300 \mathrm{~K}$.

(a) Calculate the mean speed of the molecules.

(b) Suppose the molecules strike the wall with this speed making an average angle of $45^{\circ}$

with it. How many molecules strike each square meter of the wall per second?

Solution: