The enthalpy of evaporation of water is 40.67 kJ/mol.Sunlight striking Earth’s surface supplies 168 W per squaremeter (1 W = 1 watt = 1 J/s). (a) Assuming that evaporationof water is due only to energy input from the Sun,calculate how many grams of water could be evaporatedfrom a 1.00 square meter patch of ocean over a 12-h day.(b) The specific heat capacity of liquid water is 4.184 J/g °C.If the initial surface temperature of a 1.00 square meter patchof ocean is 26 °C, what is its final temperature after being insunlight for 12 h, assuming no phase changes and assumingthat sunlight penetrates uniformly to depth of 10.0 cm?
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.
The enthalpy of evaporation of water is 40.67 kJ/mol.
Sunlight striking Earth’s surface supplies 168 W per square
meter (1 W = 1 watt = 1 J/s). (a) Assuming that evaporation
of water is due only to energy input from the Sun,
calculate how many grams of water could be evaporated
from a 1.00 square meter patch of ocean over a 12-h day.
(b) The specific heat capacity of liquid water is 4.184 J/g °C.
If the initial surface temperature of a 1.00 square meter patch
of ocean is 26 °C, what is its final temperature after being in
sunlight for 12 h, assuming no phase changes and assuming
that sunlight penetrates uniformly to depth of 10.0 cm?
Trending now
This is a popular solution!
Step by step
Solved in 5 steps with 5 images
