Question 357: Thermodynamics & KTG

Question

if the rms speed of oxygen molecules at 0$$^\circ$$C is 160 m/s, find the rms speed of hydrogen molecules at 0$$^\circ$$C.

Accepted Answer

$${V_{rms}} = \sqrt {{{3KT} \over M}} $$
$${{{{({V_{rms}})}_{{O_2}}}} \over {{{({V_{rms}})}_{{H_2}}}}} = \sqrt {{{{M_{{H_2}}}} \over {{M_{{O_2}}}}}}  = \sqrt {{2 \over {32}}} $$
$${({V_{rms}})_{{H_2}}} = 4 	imes {({V_{rms}})_{{O_2}}}$$
$$ = 4 	imes 160$$
$$ = 640$$ m/s

Answer

640 m/s

Answer

40 m/s

Answer

80 m/s

Answer

332 m/s

Thermodynamics & KTG

if the rms speed of oxygen molecules at 0$^\circC is 160 m/s, find the rms speed of hydrogen molecules at 0^\circ$C.

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