A piece of aluminum with a mass of 23.5 grams at a temperature of 0.0°C is dropped into an insulated cup (assume that the cup does not gain or lose heat) containing hot water. The temperature of the water in the insulated cup drops from 95.0°C to 87.2 °C. a) What quantity of heat energy (q) did the piece of aluminum absorb? +qAI = mai • AT • s +qAI = [ Select ] joules b) What is the mass (grams) of the water in the insulated cup? [ Select ] MH20 = grams Specific Heat: Heat Transfer Eq.: H20 [s = 4.184 J/(g •°C)] - Ян20 %D Al [s = 0.902 J/(g •°C)] + mAI • AT • SAI = mH20 • AT • SH2O %D
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.
![A piece of aluminum with a mass of 23.5 grams at a temperature of 0.0°C is dropped into an insulated
cup (assume that the cup does not gain or lose heat) containing hot water. The temperature of the
water in the insulated cup drops from 95.0°C to 87.2 °C.
a) What quantity of heat energy (q) did the piece of aluminum absorb?
+qAI = mẠi • AT • s
+qaI =
[ Select ]
joules
b) What is the mass (grams) of the water in the insulated cup?
mH20 =
[ Select ]
grams
Specific Heat:
Heat Transfer Eq.:
H20 [s = 4.184 J/(g •°C)]
- Ян20
Al [s = 0.902 J/(g •°C)]
+ mAI • AT • SAI =
mH20 • AT • SH2O](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fb99220ad-d702-4943-b904-ec3abe399c73%2F3f925751-2e34-4e99-bde0-a174892d8461%2Fzl63tr_processed.png&w=3840&q=75)
Mass of Aluminium = 23.5
Final temperature = 87.2°C
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