A sample of liquid in a thermally insulated container (a calorimeter) is stirred for 1 h by a mechanical linkage to a motor in the surroundings (Assume that expansion of the system is negligible.) q=0, w=0, AH > 0, AU = 0 q=0, w=0, AH > 0, AU > 0 q=0, w=0, AH = 0, AU = 0 q=0, w > 0, AH = 0, AU > 0 q=0, w 0, AU > 0 Submit Request Answer