SATHEE: Thermodynamics - Result Question 5

Thermodynamics - Result Question 5

5. The internal energy change in a system that has absorbed 2 kcals of heat and done $500 J$ of work is:

(a) $6400 J$

(b) $5400 J$

(d) $8900 J$

[2009]

Show Answer

Answer:

Correct Answer: 5. (c)

Solution:

$Q = Δ U + W$

$Δ U = Q - W$

$= 2 \times 4.2 \times 1000 - 500 = 8400 - 500$

$= 7900 J$

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Thermodynamics - Result Question 5

5. The internal energy change in a system that has absorbed 2 kcals of heat and done 500J of work is:

Answer:

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5. The internal energy change in a system that has absorbed 2 kcals of heat and done $500 J$ of work is: