4. How much heat is required to raise the temperature of 8.787g of CCl4 from 37.1°C to 56.4°C? Cp CCl4 = 0.856 J/g °C 145 J 5 How much heat is required to raise the temperature of 7.90 x 102g of water from 38.4°C to 85.4°C? Ćp H₂O (I) = 4.184J/g °C 155,000 J 6. If a piece of aluminum with a mass of 2.39g and a temperature of 100.0°C is dropped into 10.0cm³ of water at 14.1°C, what will be the final temperature of the system? (Use 1.00g/cm³as the density of water.) Cp Al = 0.900J/g °C 18.3°C
4. How much heat is required to raise the temperature of 8.787g of CCl4 from 37.1°C to 56.4°C? Cp CCl4 = 0.856 J/g °C 145 J 5 How much heat is required to raise the temperature of 7.90 x 102g of water from 38.4°C to 85.4°C? Ćp H₂O (I) = 4.184J/g °C 155,000 J 6. If a piece of aluminum with a mass of 2.39g and a temperature of 100.0°C is dropped into 10.0cm³ of water at 14.1°C, what will be the final temperature of the system? (Use 1.00g/cm³as the density of water.) Cp Al = 0.900J/g °C 18.3°C
Chemistry & Chemical Reactivity
10th Edition
ISBN:9781337399074
Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Chapter5: Principles Of Chemical Reactivity: Energy And Chemical Reactions
Section: Chapter Questions
Problem 113SCQ
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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.
Question
Please help with 4,5,&6
Transcribed Image Text:Chem 105-C
Pre-lab Questions:
1.
2. Why is water an excellent material to use in the calorimeter?
3.
(Answers in proper number of significant figure
are given to numerical questions to aid you
What physical properties, other than specific heat, could you use to help you identify
the sample used in this experiment?
4.
5.
How much heat is required to raise the temperature of 54.5g of PCl3 from 18.6°C to
79.1°C?
Cp PC13= 0.874 J/g °C
2880J
How much heat is required to raise the temperature of 8.787g of CCl4 from 37.1°C to
56.4°C? Cp CCl4 = 0.856 J/g °C
145 J
How much heat is required to raise the temperature of 7.90 x 102g of water from
38.4°C℃ to 85.4°C? Cp H₂O (I) = 4.184J/g °C
155,000 J
6.
If a piece of aluminum with a mass of 2.39g and a temperature of 100.0°C is dropped
into 10.0cm³ of water at 14.1°C, what will be the final temperature of the system?
(Use 1.00g/cm³as the density of water.)
Cp Al = 0.900J/g °C
18.3°C
7.
If a piece of cadmium (Cd) with a mass of 75.2g and a temperature of 100.0°C is
dropped into 25.0g of water at 23.0°C, what will be the final temperature of the
system? Cp Cd = 0.230J/g °C
otomor 34.0°C
8.
A piece of unknown metal with a mass of 5.19g is heated to 100.00°C and dropped
into 10.0mL of water at 22.00°C. The final temperature of the system is 23.83°C. What
is the specific heat of the metal?
0.193 J/g °C
9.
A piece of an unknown metal with a mass of 23.8g is heated to 100.0°C and dropped
in 50.0g of water at 24.0°C. The final temperature of the system is 32.50°C. What is the
specific heat of the metal?
1.1 J/g °C
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