Question

Knowing that average kinetic energy of an ideal gas (X) is directly proportional to absolute temperature, if T1 = 273 K, which statement(s) describe(s) the other curves ?​

Answer 1

Answer:

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Explanation:

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Answer 2

Answer:

The statements which describe other curves are (A), (B), and (D)

1. The statement (A) is “Curve A is for heavier gas but at the same temperature.”
2. The statement (B) is “Curve B is for the same gas but at 373K.”
3. The statement (D) is “Curve B is for lighter gas but at the same temperature.”

Explanation:

The statement (C), Curve A is for the same gas but at 373K., is not correct because of two reasons -

• if M (molecular weight) is less then the velocity increases according to the formula $c = \sqrt{\frac{3RT}{M} }$
• As temperature increases, velocity increases according to the formula   $K.E = (3/2)kt$

The (M) of an X gas is lesser than the (M) of gas A, and temperature is also given higher in statement (C). Hence, its velocity should be higher than gas A, which is not fitting in the curves according to statement (C).

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