Chemistry

Problem

A closed gas system undergoes the two-step pathway shown below (values are from the system’s perspective). Step | q (J) | w (J) 1 | +300 | 0 2 | −100 | −350 Which statement about the overall energy change after both steps is correct? a) The system’s internal energy increases by

200\text{ J}

; the overall process is endothermic. b) The system’s internal energy decreases by

150\text{ J}

; the overall process is exothermic. c) The system’s internal energy decreases by

150\text{ J}

; the overall process is endothermic. d) The system’s internal energy increases by

550\text{ J}

; the overall process is endothermic.

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