Question #62542
(1) Calculate ΔE, if q= 0.767 kJ and w= -870 J .
(2)Calculate ΔE, if a system releases 66.7 kJ of heat to its surroundings while the surroundings do 44.0 kJ of work on the system
(2)Calculate ΔE, if a system releases 66.7 kJ of heat to its surroundings while the surroundings do 44.0 kJ of work on the system
Expert's answer
ΔE = q + w
1)ΔE = 0.767*10^3 + (-870) = -103 (J);
2)ΔE = -66.7 + 44.0 = -22.7 (kJ) = -22.7*10^3 (J)
Though the system loses heat, a value of 'q' was taken with minus.
1)ΔE = 0.767*10^3 + (-870) = -103 (J);
2)ΔE = -66.7 + 44.0 = -22.7 (kJ) = -22.7*10^3 (J)
Though the system loses heat, a value of 'q' was taken with minus.
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#339914 on Dec 2023
#339914 on Dec 2023
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