Question 310: Thermodynamics & KTG

Question

The number of molecules in one litre of an ideal gas at 300 K and 2 atmospheric pressure with mean kinetic energy 2 $$	imes$$ 10
$$-$$9
J per molecules is :

Accepted Answer

KE = $${3 \over 2}kT$$
PV = $${N \over {{N_A}}}RT$$
N = $${{PV} \over {kT}}$$
= N = 1.5 $$	imes$$ 10
11

Answer

0.75 $$	imes$$ 10
11

Answer

3 $$	imes$$ 10
11

Answer

1.5 $$	imes$$ 10
11

Answer

6 $$	imes$$ 10
11

Thermodynamics & KTG

The number of molecules in one litre of an ideal gas at 300 K and 2 atmospheric pressure with mean kinetic energy 2 $\times 10 -$9 J per molecules is :

Choose the correct answer: