A solution was prepared by dissolving 18.00g glucose in 150.0g water. The resulting solution was found to have a boiling point 100.34°C. the boiling point elevation constant of water kbp = +0.5121°C/m a) what is the molarity of glucose solution ? b) what is the molar mass of glucose? Show calculated value
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.
Bromine has a normal melting point of -7.2°C and boiling point of 59°C. The triple point of bromine is -7.3°C and 40 mm Hg, and the critical point is 320°C and 100 atm.
a) using the above information, sketch a phase diagram of Bromine indicating all the points described above.
b) based on your diagram, order the three phases( solid ,liquid and gas) from least dense to most dense
c) what is the stable phase of bromine at room temperature and 1 atm?
d) under what temperature conditions can liquid Bromine never exist?
e) what phase changes occurs as the temperature of sample of bromine at 0.10 atm is increased from -50°C to 200°C ?
A solution was prepared by dissolving 18.00g glucose in 150.0g water. The resulting solution was found to have a boiling point 100.34°C. the boiling point elevation constant of water kbp = +0.5121°C/m
a) what is the molarity of glucose solution ?
b) what is the molar mass of glucose? Show calculated value
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