Chemistry Crash Course NEET>Chapter 4 - Thermodynamics>Level 1>Q 66

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IMPORTANT

Earn 100

Two moles of an ideal gas expand spontaneously into a vacuum. The work done is ______ Joule.

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Important Questions on Thermodynamics

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IMPORTANT

Chemistry Crash Course NEET>Chapter 4 - Thermodynamics>Level 1>Q 67

W gm

of a gas expands isothermally and reversibly at a given temperature

T

from volume

V_{1}

to

V_{2}

. The magnitude of the work will be_____. (assuming these gases as ideal gases)

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Chemistry Crash Course NEET>Chapter 4 - Thermodynamics>Level 1>Q 68

The work done in ergs for a reversible expansion of

n mole

of an ideal gas from a volume of

20 L

to

40 L

at

25 ° C

is ______.

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Chemistry Crash Course NEET>Chapter 4 - Thermodynamics>Level 1>Q 69

The work done when

1 {.6\times10}^{- 2} kg

of oxygen at

300 K

are expanded isothermally and reversibly, till its volume is tripled to _____.

(R =8.314 {JK}^{- 1} {mol}^{- 1})

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Chemistry Crash Course NEET>Chapter 4 - Thermodynamics>Level 1>Q 70

If

2500 cal

of heat is added to a system while the system does work equivalent to

3500 cal

by expanding against the surrounding atmosphere, the value of

∆ U

for the system is _____.

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Chemistry Crash Course NEET>Chapter 4 - Thermodynamics>Level 1>Q 71

The incorrect statement in relation to first law of thermodynamics i.e.,

∆ U=q+W

is,______

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Chemistry Crash Course NEET>Chapter 4 - Thermodynamics>Level 1>Q 72

For

{CaCO}_{3 (s)} \overset{}{⇌} {CaO}_{(s)} + {CO}_{2 (g)}

at

977 º C

;

∆ H = 176 kJ / mol,

then

∆ U

is________.

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Chemistry Crash Course NEET>Chapter 4 - Thermodynamics>Level 1>Q 73

The internal energy change when a system goes from state A to B is 40 kJ/mole. If the system goes from A to B by a reversible path and returns to state A by an irreversible path what would be the net change in internal energy?

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Chemistry Crash Course NEET>Chapter 4 - Thermodynamics>Level 1>Q 74

Which of the following has no change in the internal energy for an ideal gs?