Part B How long would it take for 1.50 mol of water at 100.0 °C to be converted completely into steam if heat were added at a constant rate of 25.0 J/s ? Express your answer to three significant figures and include the appropriate units. ► View Available Hint(s) μA Value Submit Units ?
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.
![Part B
How long would it take for 1.50 mol of water at 100.0 °C to be converted completely into steam if heat were added at a constant rate
of 25.0 J/s ?
Express your answer to three significant figures and include the appropriate units.
► View Available Hint(s)
Value
Submit
Units
2
?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F9b15a2e4-841f-4430-ad46-9439390435a9%2Fb865fd73-a8c5-4536-a53f-36c97731386e%2Fmxdjhic_processed.png&w=3840&q=75)
![Equations
The heat energy associated with a change in temperature that does not involve a change in phase is given by
q=msAT
where q is heat in joules, m is mass in grams, s is specific heat in joules per gram-degree Celsius, J/(g · °C), and AT is the
temperature change in degrees Celsius. The heat energy associated with a change in phase at constant temperature is given by
q=mΔΗ
where q is heat in joules, m is mass in grams, and AH is the enthalpy in joules per gram.
Physical constants
The constants for H₂O are shown here:
●
●
Specific heat of ice: Sice = 2.09 J/(g. °C)
Specific heat of liquid water: swater = 4.18 J/(g · °C)
Enthalpy of fusion (H₂O(s)→H₂O(1)): AHfus = 334 J/g
Enthalpy of vaporization (H₂O(1)→H₂O(g)): AHvap = 2250 J/g](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F9b15a2e4-841f-4430-ad46-9439390435a9%2Fb865fd73-a8c5-4536-a53f-36c97731386e%2F0m3uu55_processed.png&w=3840&q=75)
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