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An ideal gas initially at 300 K undergoes an isobaric expansion at 250 kPa. If the volume increases from 1 m ^ 3 to 3 m ^ 3 and it is known that the gas received 12.5 kJ of energy as heat, find the change in its internal energy in kJ.
a) 7.5
b) - 7.5
c) 17.5
d) - 17.5

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An ideal gas initially at 300 K undergoes an isobaric expansion at 250 kPa. If the volume increases from 1 m ^ 3 to 3 m ^ 3 and it is known that the gas received 12.5 kJ of energy as heat, find the change in its internal energy in kJ. a) 7.5 b) - 7.5 c) 17.5 d) - 17.5