A sample of an ideal gas is in a tank of constant volume. The sample absorbs heat energy so that its temperature changes from 335 K to 1340 K. If v1 is the average speed of the gas molecules before the absorption of heat and v2 their average speed after the absorption of heat, what is the ratio v2

The ratio of v₂/v₁ is 2

Explanation:

Here we have Charles law which can be presented as

P₁/T₁ = P₂/T₂

Therefore,

P₂ = T₂ × P₁/T₁

Also from the kinetic theory of gases we have;

Where:

= Rms speed

R = Universal gas constant

T = Temperature in Kelvin

MW = Molecular weight

We therefore have for the before and after speeds as

and

Therefore,  

∴ v₂/v₁ = 2.

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find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2