Find the number of molecules per m 3 at 200 K and a pressure of 2.0 × 1 0 − 3 N/ m 2 , in units of 1 0 17 (two decimals).

n = k T P = 1.38 × 1 0 − 23 × 200 2.0 × 1 0 − 3 = 7.25 × 1 0 17 m − 3 .

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PhysicsHeat & ThermoKinetic Theory of Gases and Gas LawsMedium2 minQB

PhysicsMediumnumerical

Find the number of molecules per $m^{3}$ at 200 K and a pressure of $2.0 \times 1 0^{- 3}$ N/ $m^{2}$ , in units of $1 0^{17}$ (two decimals).

Answer:

7.25

Solution:

$n = \frac{P}{k T} = \frac{2.0 \times 1 0 ^{- 3}}{1.38 \times 1 0 ^{- 23} \times 200} = 7.25 \times 1 0^{17}$

$m^{- 3}$ .

Subject:PhysicsTopic:Heat & ThermoSubtopic:Kinetic Theory of Gases and Gas Laws

⏱ 2mℹ️ Source: QB

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