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AP and TS EAMCET Engineering 2020 Model Paper 1

Question : 126 of 160

Marks: +1, -0

Correct gas equation is

Solution:

If temperature volume and pressure of fixed amount (say n mole) of a gas vary

from

T_1, V_1

and

\rho_1

T_2, V_2

and

\rho_2

respectively. Then, ideal gas equation for two states can be written as

\rho_1 V_1 = nRT_1

\frac{\rho_1 V_1}{T_1} = nR

......(i)

\rho_2 V_2 = nRT_2

\frac{\rho_2 V_2}{T_2} = nR

......(ii)

on combining Eqs. (i) and (ii), we get

\frac{\rho_1 V_1}{T_1} = \frac{\rho_2 V_2}{T_2}

\frac{\rho_1 V_1}{\rho_2 V_2} = \frac{T_1}{T_2}

So, it called combined gas equation

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