heat of reaction

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• heat of reaction — the heat evolved or absorbed during a chemical reaction taking place under conditions of constant temperature and of either constant volume or more often constant pressure; especially : the quantity involved when gram equivalents of the… …   Useful english dictionary

• heat of combustion — n the heat of reaction resulting from the complete burning of a substance and expressed variously (as in calories per gram or per mole) see BOMB CALORIMETER …   Medical dictionary

• reaction, heat of — Amount of heat that must be added or removed during a chemical reaction to keep all substances involved at the same temperature. If it is positive (heat must be added), the reaction is endothermic; if it is negative (heat is given off), the… …   Universalium

• Reaction engine — A reaction engine is an engine which provides propulsion by expelling reaction mass, in accordance with Newton s third law of motion. This law of motion is most commonly paraphrased as: For every action force there is an equal, but opposite,… …   Wikipedia

• heat of formation — noun the heat evolved or absorbed during the formation of one mole of a substance from its component elements (Freq. 2) • Hypernyms: ↑heat, ↑heat energy * * * : the heat of reaction resulting from the formation of a compound by direct union of… …   Useful english dictionary

• heat of dissociation — noun the heat required for a fluid substance to break up into simpler constituents (Freq. 1) • Hypernyms: ↑heat, ↑heat energy * * * : the heat of reaction resulting from dissociation of molecules of a compound into smaller molecules, fragments,… …   Useful english dictionary

• heat of combustion — the heat of reaction resulting from the complete burning of a substance and expressed variously (as in calories per gram or per mole or especially for fuels in British thermal units per pound or per cubic foot) …   Useful english dictionary

• heat of decomposition — the heat of reaction resulting from the decomposition of a compound into its elements or into other neutral compounds; especially : the quantity involved in the decomposition of a mole …   Useful english dictionary

• heat of neutralization — the heat of reaction resulting from the neutralization of an acid or base; especially : the quantity produced when a gram equivalent of a base or acid is neutralized with a gram equivalent of an acid or base in dilute solution …   Useful english dictionary

• Heat transfer — is a discipline of thermal engineering that concerns the exchange of thermal energy from one physical system to another. Heat transfer is classified into various mechanisms, such as heat conduction, convection, thermal radiation, and phase change …   Wikipedia

• Reaction Engines Limited — Type Private Industry Aerospace Founded 1989 …   Wikipedia