817-1 Heat as Energy Transfer O Absorbing heat: Q>0; Losing heat: Q<0 o Heat is path- dependent quantity(过程量) Heat is energy that is transferred from one body to another because of a difiference in temperature In SI units, the unit for heat is the joule. 1 Calorie=4. 186J§17-1 Heat as Energy Transfer Absorbing heat：Q>0；Losing heat：Q<0 Heat is path-dependent quantity（过程量）. 1 Calorie=4.186 J Heat is energy that is transferred from one body to another because of a difference in temperature. In SI units, the unit for heat is the joule