Physics a thermodynamic quantity equivalent to the total heat content of a system. It is equal to the internal energy of the system plus the product of pressure and volume. (Symbol: H)
【物理】 焓,热函(符号:H)。
the change in this quantity associated with a particular chemical process
(与特定的化学反应过程相关的)焓变。
词源
"1920s: from Greek enthalpein ‘warm in', from en- ‘within' + thalpein ‘to heat’."