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Question

Find the dimensions of

(a) the specific heat capacity c,

(b) the coefficient of linear expansion α and

(c) lthe gas constant R.

Some of the equations involving these quatities are Q=mc(T2T1), l1=l0[1+α(T2T1)] and PV = nRT.

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Solution

(a) Specific heat capacity,

C=QmΔT=ML2T2[M][K]

=[L2T2K1]

(b) Coefficient of linear expansion,

α=L1L0L0ΔT=[L][LK]=[K1]

(c) Gas constant,

R=PVnT=[ML1T2][L3][(mol)][K]

=[ML2T2K1(mol)1]


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