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.
![Topic 11 Written HW
Name:
4. If water is added to Magnesium Nitride, ammonia gas is produced when the mixture is
heated.
Mg3N2(s) +H₂O(1)→ MgO(s) + NH3(g)
If 13.6 grams of magnesium nitride is heated with water, what volume of ammonia gas (in
mL) would be collected at 35°C and 0.937 atm of pressure?
5. If there is 256mL of propane (C3H8) is combusted at a constant pressure and temperature.
C3H8 + O2(g) → H₂O(g) + 3 CO₂(g)
3ML
Determine the volume of ML
a. Carbon dioxide produced in mL.
IML C3H83ML CO2
256 mL C3H83x256 m² CO₂ = 768 mL CO₂)
b. Water vapor produced in mL.
IML C3H84 m L H ₂ O
256MLC3H84x256 mL H₂0 (v) = 1024mL H₂ Qv)
6. Circle the statement(s) that is/are true. For the false statement(s), explain why they are
false.
a. If the number of moles of a gas is doubled, the volume will double, assuming the
pressure and temperature of the gas remain constant.
b. If the temperature of a gas increases from 25°C to 50°C, the volume of the gas
would double, assuming that the pressure and the number of moles of gas remain
constant.
c. The device that measures atmospheric pressure is called a barometer.
unlume of a gas decreases by one-half, then the pressure would double,](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fa7e1480f-493b-4334-b48e-1a7032a37693%2Fc2f8b74c-209c-472c-9eae-0f9fa7f0277a%2Fkwfeec_processed.jpeg&w=3840&q=75)
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