Use the observation in the first column to answer the question in the second column. observation The enthalpy of vaporization of Substance A is bigger than that of Substance B. At 28 °C, Substance C has a vapor pressure of 114. torr and Substance D has a vapor pressure of 134. torr. At 1 atm pressure, Substance E boils at -12. °C and Substance F boils at -44. °C. question At any temperature where both substances are liquid, which has the higher vapor pressure? O Substance A O Substance B Neither, A and B have the same vapor pressure. O It's impossible to know without more information. Which has a higher enthalpy of vaporization? O Substance C O Substance D O Neither, C and D have the same enthalpy of vaporization. O It's impossible to know without more information. Which has a higher vapor pressure? Substance E O Substance F O Neither, E and F have the same vapor pressure. It's impossible to know without more information.
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.
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