Assertion: heat | /r/AtLocation | the system
Facets:
value: by its surroundings
type: OTHER
value: from its surroundings
type: LOCATION
value: from heat
type: CAUSE
Source sentences:
text: In this scenario, the increase in enthalpy is equal to the quantity of heat added to the system.
text: Also, as with work, it is important to distinguish between heat added to a system from its surroundings and heat removed from a system to its surroundings.
text: The internal energy has the symbol U. Q is positive if heat is added to the system, and negative if heat is removed; W is positive if work is done by the system, and negative if work is done on the system.
text: A positive value for heat indicates that heat is added to the system by its surroundings.
text: Instead of being "wasted" by release into the ambient environment, sometimes waste heat (or cold) can be utilized by another process (such as using hot engine coolant to heat a vehicle), or a portion of heat that would otherwise be wasted can be reused in the same process if make-up heat is added to the system (as with heat recovery ventilation in a building).