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yan [13]
2 years ago
13

Calculate δe, if q= 0.764 kj and w= -830 j . express your answer using two significant figures.

Mathematics
1 answer:
Deffense [45]2 years ago
8 0
Given:
Q = 0.0764 kJ = 764 J, heat input
W = -830 J, useful work done

From the 1st Law of Thermodynamics, the change in internal energy is
δE = Q - W
     = 764  - (-830)
     =  1594 J = 1.594 kJ

Answer: 1.59 kJ (two sig. fig.)
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