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During the adiabatic expansion of 2 moles of a gas the internal energy of a gas is found to decrease by 2J. The work done during the process on gas will be equal to
  • a)
    –2 J
  • b)
    3 J
  • c)
    1J
  • d)
    2J
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
During the adiabatic expansion of 2 moles of a gas the internal energy...
Given:
n = 2 moles
ΔU = -2 J (internal energy decreases)
W = ?

Explanation:
During adiabatic expansion, no heat is exchanged between the system and the surroundings. Hence, q = 0.
The First Law of Thermodynamics is given by: ΔU = q + W
Substituting q = 0, we get: ΔU = W
Therefore, work done during the process is equal to the decrease in internal energy of the gas.
Hence, W = -2 J.

Answer:
Option A - -2 J.
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Community Answer
During the adiabatic expansion of 2 moles of a gas the internal energy...
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During the adiabatic expansion of 2 moles of a gas the internal energy of a gas is found to decrease by 2J. The work done during the process on gas will be equal toa)–2 J b) 3 Jc)1Jd)2JCorrect answer is option 'A'. Can you explain this answer?
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