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Ratio of C(P) and C(v) depends upon temp...

Ratio of `C_(P)` and `C_(v)` depends upon temperature according to the following relation

A

`gamma alpha` T

B

`gamma alpha 1//T`

C

`gamma alpha sqrt(T)`

D

`gamma alpha T^(o)`

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The correct Answer is:
To solve the problem regarding the ratio of \( C_p \) (molar specific heat capacity at constant pressure) and \( C_v \) (molar heat capacity at constant volume) and how it depends on temperature, we can follow these steps: ### Step-by-Step Solution: 1. **Understanding the Definitions**: - \( C_p \) is the heat capacity at constant pressure. - \( C_v \) is the heat capacity at constant volume. - The ratio \( \gamma \) is defined as: \[ \gamma = \frac{C_p}{C_v} \] 2. **Identifying the Nature of Gases**: - The value of \( \gamma \) varies depending on the type of gas: - For monoatomic gases, \( \gamma = \frac{5}{3} \). - For diatomic gases, \( \gamma = \frac{7}{5} \). - For polyatomic gases, \( \gamma = \frac{9}{3} \) (which simplifies to \( 3 \)). 3. **Temperature Independence**: - It is important to note that \( C_p \) and \( C_v \) are generally considered to be independent of temperature for ideal gases in the context of this problem. - Thus, \( \gamma \) can be treated as a constant for a given type of gas. 4. **Conclusion about Temperature Dependence**: - Since \( \gamma \) is constant for different types of gases and does not change with temperature, we can conclude that: \[ \gamma \text{ is independent of temperature, or } \gamma \propto T^0 \] - Therefore, the correct answer to the question is that the ratio \( \frac{C_p}{C_v} \) does not depend on temperature. ### Final Answer: The ratio \( \frac{C_p}{C_v} \) (denoted as \( \gamma \)) is independent of temperature.
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Knowledge Check

  • Assertion : The heat of a reaction does not depend upon the temperature at which reaction is carried out. Reason : Temperature is a state function.

    A
    If both Assertion and Reason are CORRECT and Reason is the CORRECT explanation of the Assertion.
    B
    If both Assertion and Reason are CORRECT but Reason is not the CORRECT explanation of the Assertion.
    C
    If Assertion is CORRECT but Reason is INCORRECT.
    D
    If Assertion is INCORRECT but Reason is CORRECT.
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