Chemistry Crash Course NEET>Chapter 4 - Thermodynamics>Level 2>Q 2

EASY

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IMPORTANT

Earn 100

At $302 K$ , one mole of an ideal gas is compressed isothermally and reversibly from a pressure of $2 atm to 10 atm .$ The values of $∆U$ and $q$ , respectively will be _____.

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Important Questions on Thermodynamics

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IMPORTANT

Chemistry Crash Course NEET>Chapter 4 - Thermodynamics>Level 2>Q 3

An athlete is given glucose of energy equivalent to

880 kJ

. He utilises

50 %

of this gained energy in the event, in order to avoid storage of energy in the body. The weight of water he would need to perspire is_____. (Enthalpy of evaporation of water is

44 kJ {mol}^{- 1}

)

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Chemistry Crash Course NEET>Chapter 4 - Thermodynamics>Level 2>Q 4

The standard enthalpy of formation

(∆ H_{f}^{\circ})

at

298 K

for methane,

{CH}_{4 (g)}

is

-74.5 kJ / mol

. The additional information required to determine the average energy for

C - H

bond dissociation would be ________.

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Chemistry Crash Course NEET>Chapter 4 - Thermodynamics>Level 2>Q 5

Work done on

3

moles of a perfect gas at

27 ° C

, if it is compressed reversibly and isothermally from a pressure of

1.01 \times 10^{5}

{Nm}^{- 2}

to

5.05 \times 10^{6}

{Nm}^{- 2}

is:

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Chemistry Crash Course NEET>Chapter 4 - Thermodynamics>Level 2>Q 6

0.5

mole each of two ideal gases,

A (C_{v, m} = \frac{5}{2} R)

and

B (C_{v, m} = 3 R)

, are taken in a container and expanded reversibly and adiabatically. During this process, the temperature of gaseous mixture decreased from

350 K

and

250 K

. Then for the process:

MEDIUM

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Chemistry Crash Course NEET>Chapter 4 - Thermodynamics>Level 2>Q 7

In thermodynamics, a process is called reversible when.

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Chemistry Crash Course NEET>Chapter 4 - Thermodynamics>Level 2>Q 8

Which one of the following statements is false?

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Chemistry Crash Course NEET>Chapter 4 - Thermodynamics>Level 2>Q 9

4 g

of

He

is expanded from

1 litre to 10 litres

isothermally and reversibly. The change in entropy is:

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Chemistry Crash Course NEET>Chapter 4 - Thermodynamics>Level 2>Q 10

Which of the following values of the heat of formation indicates that the product is the least stable?