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NEET 2006
Exam
NEET
Year
2006
Subject
Physics
Chapter
Kinetic Theory of Gases

NEET 2006 · Physics · Kinetic Theory of Gases

The molar specific heat at constant pressure of an ideal gas is...

The molar specific heat at constant pressure of an ideal gas is (7/2) RR. The ratio of specific heat at constant pressure to that at constant volume is:

Options

  1. A9/79 / 7
  2. B7/57 / 5
  3. C8/78 / 7
  4. D5/75 / 7

Correct answer

B. 7/57 / 5

Step-by-step solution

Molar specific heat at constant pressure C_P=72\frac{7}{2}R We know that CP−CV=RC_P-C_V=R \Rightarrow \quad CV=CP−R=72R−R=52R\begin{aligned}C_V & =C_P-R \\ & =\frac{7}{2}R-R=\frac{5}{2}R \end{aligned} from (i)and(ii),∴(i) and (ii), \therefore \quad\frac{C_P}{C_V}=\frac{7}{5} .
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