A sample of CH4Br2 has a normal boiling temperature of 131.5 °C. The enthalpy of vaporization for this compound is 35.4 kJ/mol. What would be the boiling temperature in °C of C.H.Br2 at a pressure of 540.0 mm Hg? Report your answer using three significant figures. How much energy would be required to heat a 40.9 gram sample of liquid CH4Br2 from 97.5 °C to a gas at 187.2 °C? The specific heat for the liquid is 0.865 J/g °C and the specific heat for the gas is 0.364 J/g °C.
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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![A sample of C3H4Br2 has a normal boiling temperature of 131.5 °C. The
enthalpy of vaporization for this compound is 35.4 kJ/mol.
What would be the boiling temperature in °C of C3H.Br2 at
a pressure of 540.0 mm Hg? Report your answer using
three significant figures.
How much energy would be required to heat a 40.9 gram
sample of liquid CH4Br₂ from 97.5 °C to a gas at 187.2
°C? The specific heat for the liquid is 0.865 J/g °C and
the specific heat for the gas is 0.364 J/g. °C.
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