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During an isothermal expansion, a confined ideal gas does –150 J of work against its surroundings. This implies that [2011]
  • a)
    150 J heat has been removed from the gas
  • b)
    300 J of heat has been added to the gas
  • c)
    no heat is transferred because the process is isothermal
  • d)
    150 J of heat has been added to the gas
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
During an isothermal expansion, a confined ideal gas does –150 J...
From the first law of thermodynamics

ΔU = Q + W

For isothermal process, ΔU = 0

therefore, Q = - W

Given W = - 150 

Therefore, Q = + 150

When Q is positive, the heat is added to the gas.
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Most Upvoted Answer
During an isothermal expansion, a confined ideal gas does –150 J...
Work on its surroundings, which results in a decrease in its internal energy. However, the temperature of the gas remains constant during the process. This is because the energy transferred to the surroundings as work is balanced by the energy gained from the surroundings due to heat flow into the system. As a result, the pressure and volume of the gas are inversely proportional to each other, following the ideal gas law. The work done by the gas during an isothermal expansion can be calculated using the equation W = nRTln(V2/V1), where n is the number of moles of gas, R is the gas constant, T is the temperature, V1 is the initial volume, and V2 is the final volume of the gas.
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During an isothermal expansion, a confined ideal gas does –150 J...
Yanha par chemistry ka formula use kiya hai
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During an isothermal expansion, a confined ideal gas does –150 J of work against its surroundings. This implies that [2011]a)150 J heat has been removed from the gasb)300 J of heat has been added to the gasc)no heat is transferred because the process is isothermald)150 J of heat has been added to the gasCorrect answer is option 'D'. Can you explain this answer?
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