## Question

One mole of oxygen is heated from 0^{o}C, at constant pressure, till its volume increases by 10%. The specific heat of oxygen, under these conditions is 0.22 cal g ^{– 1 }K^{ – 1}. The amount of heat required (in joules) is

### Solution

For an enclosed gas at constant pressure (Charles’ law). Hence, to increase the volume by 10%, the absolute temperature must be increased by 10%. Initial temperature is *T = *273 k. The final temperature must be Therefore, rise in temperature = 300.3 – 273 = 27.3 K.

#### SIMILAR QUESTIONS

A thin metal square plate has length *l*. When it is heated from 0^{o}C to 100^{o}C, its length increases by 1%. What is the percentage increase in the area of the plate?

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A thin metal square plate has length *l*. When it is heated from 0^{o}C to 100^{o}C, its length increases by 1%. What is the percentage increase in the area of the plate?

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