Use the heating curve to answer the following questions. At -55 °C the substance is: O a solid a liquid a gas melting O boiling O What is the boiling point of the substance? O 0°C -114 °C 100 °C 78 °C 95 °C Temperature, (Celcius) 55555525255551525354555555515 15 15 135 95 85 75 65 -65 -75 -85 -95 -105 -115 -125 Heat added Energy added while the substance is boiling is used O O O O O To raise the temperature To lower the temperature To overcome the intermolecular forces To form the intermolecular forces To break the covalent bonds
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.
Trending now
This is a popular solution!
Step by step
Solved in 5 steps with 1 images
