Assertion: heat | /r/HasProperty | positive
Facets:
value: by convention
type: OTHER
value: for the mathematical calculations
type: PURPOSE
Source sentences:
text: The heat gained by the system or body is considered to be positive and the heat lost by the system is considered to be negative for the mathematical calculations.
text: The heat gained by the system or body is considered to be positive and the heat lost by the system is considered to be negative for the mathematical calculations.
text: Heat released by a system into its surroundings is by convention a negative quantity (Q < 0); when a system absorbs heat from its surroundings, it is positive (Q > 0).
text: This implies that the heat flowing into the system is positive and heat flowing out of the system is negative.
text: If the heat of reaction is positive, the reaction is said to be endothermic; if negative, exothermic.