The first Law- Work Work, heat energy basic concepts Energy of a system = capacity to do work At the molecular level, difference in the surroundings Energy transfer that makes use of Heat chaotic molecular motion Work .organized molecular motion △U=q+w state function -independent of how state was reachedThe First Law – Work Work, heat & energy = basic concepts Energy of a system = capacity to do work ¾ At the molecular level, difference in the surroundings state function – independent of how state was reached Energy transfer that makes use of… Heat … chaotic molecular motion Work … organized molecular motion