Question 278: Thermodynamics & KTG

Question

What will be the effect on the root mean square velocity of oxygen molecules if the temperature is doubled and oxygen molecule dissociates into atomic oxygen?

Accepted Answer

As $${v_{rms}} = \sqrt {{{3RT} \over {{M_0}}}} $$
T is doubled and oxygen molecule is dissociated into atomic oxygen molar mass is halved.
So, $$v{'_{rms}} = \sqrt {{{3RT 	imes 2{T_0}} \over {{M_0}/2}}}  = 2{v_{rms}}$$
So velocity of atomic oxygen is doubled.

Answer

The velocity of atomic oxygen remains same

Answer

The velocity of atomic oxygen doubles

Answer

The velocity of atomic oxygen becomes half

Answer

The velocity of atomic oxygen becomes four times

Thermodynamics & KTG

What will be the effect on the root mean square velocity of oxygen molecules if the temperature is doubled and oxygen molecule dissociates into atomic oxygen?

Choose the correct answer: