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Heat and Thermodynamics question

2013 · Q157
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Heat and Thermodynamics question

2013 · Q157

NEETPhysicsHeat and ThermodynamicsMCQ+4 / −1
In the given (V −-− T) diagram, what is the relation between pressure P1 and P2?

NEET 2013 Physics - Heat and Thermodynamics Question 64 English
  1. A
    P2 < P1
  2. B
    Carnot be predicted
  3. C
    P2 = P1
  4. D
    P2 > P1
View written solutionFree

Correct answer: A

NEET 2013 Physics - Heat and Thermodynamics Question 64 English Explanation

According to ideal gas equation PV = nRT

⇒V=nRTP \Rightarrow V = {{nRT} \over P}⇒V=PnRT​

For an isobaric process, P = constant and V ∝\propto∝ T
Therefore, V – T graph is a straight line passing through origin. Slope of this line is inversely proportional to P.
In the given figure,

(Slope)2 > (Slope)1   ∴\therefore∴ P2 < P1

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