(Thermodynamics)

Chemistry

1 answer:

Degger [83]3 years ago

4 0

Answer:

A) -270 kJ; B) +15 kJ; C) + 70 kJ

Step-by-step explanation:

ΔE = q + w

By convention, anything leaving the system is negative and anything entering the system is positive.

A) ΔE = -220 kJ - 50 kJ = -270 kJ

B) ΔE = +65 kJ - 50 kJ = +15 kJ

C) ΔE = -50 kJ + 120 kJ = +70 kJ

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