Which one of the following is not a thermodynamical co-ordinate?

V

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R

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T

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P

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Solution

The correct option is D $R$
$R$ is a constant term. To define a thermo dynamic state of a gas we use any two of three physical quantities $P, V$ and $T$ . Following ratio is always constant
$\frac{P V}{T} = R$ (constant)
So, if we change $P$ and $V, T$ will automatically change itself to make ratio constant.

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Which one of the following is not a thermodynamical co-ordinate?

The correct option is D RR is a constant term. To define a thermo dynamic state of a gas we use any two of three physical quantities P,V and T. Following ratio is always constantPVT=R (constant)So, if we change P and V,T will automatically change itself to make ratio constant.