1. The following statements are true EXCEPT: a. The heat of reaction is also known as the enthalpy of reaction. b. The heat of reaction pertains to the amount of energy that accompanies a chemical reaction. c. The heat of combustion refers to the amount of heat liberated per mole of a substance vaporized. d. The heat of reaction at constant volume is equal to the system’s change in internal energy. e. The heat of reaction at constant pressure is equal to the system’s change in enthalpy.
Thermochemistry
Thermochemistry can be considered as a branch of thermodynamics that deals with the connections between warmth, work, and various types of energy, formed because of different synthetic and actual cycles. Thermochemistry describes the energy changes that occur as a result of reactions or chemical changes in a substance.
Exergonic Reaction
The term exergonic is derived from the Greek word in which ‘ergon’ means work and exergonic means ‘work outside’. Exergonic reactions releases work energy. Exergonic reactions are different from exothermic reactions, the one that releases only heat energy during the course of the reaction. So, exothermic reaction is one type of exergonic reaction. Exergonic reaction releases work energy in different forms like heat, light or sound. For example, a glow stick releases light making that an exergonic reaction and not an exothermic reaction since no heat is released. Even endothermic reactions at very high temperature are exergonic.
1. The following statements are true EXCEPT:
a. The heat of reaction is also known as the enthalpy of reaction.
b. The heat of reaction pertains to the amount of energy that accompanies a
c. The heat of combustion refers to the amount of heat liberated per mole of a substance vaporized.
d. The heat of reaction at constant volume is equal to the system’s change in internal energy.
e. The heat of reaction at constant pressure is equal to the system’s change in enthalpy.
2. The following are considered as means of communicating chemical hazards EXCEPT:
a. Hazardous Material Identification System
b. Safety Data Sheet
c. GHS Classification and Labeling System Hazard
d. Hierarchy of Control
e. NFPA Hazard Identification System
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