100 points for those who can help and brainliest A small, closed chamber of gas is heated. When the gas in the chamber expands, it does 5 J of work on a piston. The gas has an initial energy of 8 Jand a final energy of 30 J. Considering the equation for the first law of thermodynamics (AU = Q + W). does the work done in this scenario have a positive or negative value? and also how much heat is added to the chamber?