Question

why is Cp greater than Cv? Explain in simple words.

Answer 1

because when heat is added at constant pressure, the substance expands and work

Answer 2

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What is Cp and Cv ?

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☑Cp is the specific heat at constant pressure .

☑Cv is the specific heat at constant volume

Now ,

What is specific heat ?

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☑Amount of heat that required to raise the temperature by 1°C .

Why Cp is always greater than Cv?

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As Cp is amount of heat that required to raise the temperature by 1°C when heat is given at constant pressure.

So pressure is fixed in Cp but some work may be done . So heat may produce.So more energy required to increase the temperature of system.

But ,

Cv is the amount of heat that required to raise the temperature by 1°C when heat is given at constant volume.

According to the equation

W = P∆V

if volume is constant then workdone is Zero . So no heat produced .Whole energy is used to increase the temperature of a system.

Result

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So we get that Cp > Cv

$\boxed{Hope\:it\:helps\:you}$