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A system absorbs 10 kJ of heat and does 4 kJ of work. The internal energy of the system
  • a)
    increases by 6 kJ
  • b)
    decreases by 6 kJ
  • c)
    decreases by 14 kJ
  • d)
    increases by 14 kJ
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
A system absorbs 10 kJ of heat and does 4 kJ of work. The internal en...
Q = + 10 kJ, w = – 4 kJ
∵ ΔE = q + w
= 10 – 4 = 6 kJ
So, energy increases by 6 kJ
Free Test
Community Answer
A system absorbs 10 kJ of heat and does 4 kJ of work. The internal en...
Given:
Heat absorbed, Q = 10 kJ
Work done, W = 4 kJ

To find: Change in internal energy, ΔU

Formula:
The first law of thermodynamics states that the change in internal energy of a system is equal to the heat absorbed by the system minus the work done by the system.
ΔU = Q - W

Calculation:
Substituting the given values in the formula, we get
ΔU = 10 kJ - 4 kJ
ΔU = 6 kJ

Therefore, the internal energy of the system increases by 6 kJ.

Answer:
(a) increases by 6 kJ
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A system absorbs 10 kJ of heat and does 4 kJ of work. The internal energy of the systema)increases by 6 kJb)decreases by 6 kJc)decreases by 14 kJd)increases by 14 kJCorrect answer is option 'A'. Can you explain this answer?
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