### 4B.5

Posted:

**Sun Feb 02, 2020 9:02 pm**An ideal gas in a cylinder was placed in a heater and gained 5.50 kJ of energy as heat. If the cylinder increased in volume from 345 mL to 1846 mL against an atmospheric pressure of 750. Torr during this process, what is the change in internal energy of the gas in the cylinder?

With the equation U = q + w, you find heat and work. For work, you get w= -P(external)Delta[/tex]V, which is w= -150 J. How is work negative?

With the equation U = q + w, you find heat and work. For work, you get w= -P(external)Delta[/tex]V, which is w= -150 J. How is work negative?