M3: Exam - Requires Respondus LockDown Browser + Webcam Question 1 pts
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Scientific Calculator Periodic Table
Equation Table Download Equation T able A reaction between HCl and NaOH is being studied in a styrofoam coffee cup with a lid and the heat given off is measured by means of a thermometer immersed in the reaction mixture. Enter the correct thermochemistry term to describe the item listed. 1. The type of thermochemical process
2. The calorimeter and mixture of HCl + NaOH
Your Answer:
1. Heat given off = Exothermic process
2. With lid = closed system Question 2
10/ 10 pts
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Scientific Calculator Periodic Table
Equation Table Download Equation T able This study source was downloaded by 100000873979981 from CourseHero.com on 04-09-2024 14:08:40 GMT -05:00
https://www.coursehero.com/file/142186874/Portage-Chem-103-Mod-3-Examdocx/ 1. Show the calculation of the final temperature of the mixture when a 22.8 gram sample of water at 74.6 oC is added to a 14.3 gram sample of water at 24.3oC in a coffee cup calorimeter.
c (water) = 4.184 J/g oC 2. Show the calculation of the energy involved in freezing 54.3 grams of water at 0oC if the Heat of Fusion for water is 0.334 kJ/g
Your Answer: 1. - (mwarn H2O x cwarn H2O x ∆twarn H2O) = (mcool H2O x ccool H2O x ∆tcool H2O) - [22.8 g x 4.184 J/g oC x (Tmix - 74.6oC)] = [14.3 g x 4.184 J/g oC x (Tmix -
24.3oC)] - [95.3952 J/oC x (Tmix - 74.6oC)] = [59.8312 J/ oC x (Tmix - 24.3oC)] Tmix = 55.2oC 2. ql↔s = m x ∆Hfusion = 54.3 g x 0.334 kJ/g = 18.14 kJ (since heat is removed)
= - 18.14 kJ Question 3 pts
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Scientific Calculator Periodic Table
Equation Table Download Equation T able Show the calculation of the ΔH of the reaction if 20.7 g of S is reacted with excess O2 to yield 255.6 kJ and sulfur trioxide by the following reaction equation. Report your answer to 4 significant figures. 2 S (s) + 3 O2 (g) → 2 SO3 (g)
Your Answer:This study source was downloaded by 100000873979981 from CourseHero.com on 04-09-2024 14:08:40 GMT -05:00
https://www.coursehero.com/file/142186874/Portage-Chem-103-Mod-3-Examdocx/
You may find the following resources helpful:
Scientific Calculator Periodic Table
Equation Table Download Equation T able A reaction between HCl and NaOH is being studied in a styrofoam coffee cup with a lid and the heat given off is measured by means of a thermometer immersed in the reaction mixture. Enter the correct thermochemistry term to describe the item listed. 1. The type of thermochemical process
2. The calorimeter and mixture of HCl + NaOH
Your Answer:
1. Heat given off = Exothermic process
2. With lid = closed system Question 2
10/ 10 pts
You may find the following resources helpful:
Scientific Calculator Periodic Table
Equation Table Download Equation T able This study source was downloaded by 100000873979981 from CourseHero.com on 04-09-2024 14:08:40 GMT -05:00
https://www.coursehero.com/file/142186874/Portage-Chem-103-Mod-3-Examdocx/ 1. Show the calculation of the final temperature of the mixture when a 22.8 gram sample of water at 74.6 oC is added to a 14.3 gram sample of water at 24.3oC in a coffee cup calorimeter.
c (water) = 4.184 J/g oC 2. Show the calculation of the energy involved in freezing 54.3 grams of water at 0oC if the Heat of Fusion for water is 0.334 kJ/g
Your Answer: 1. - (mwarn H2O x cwarn H2O x ∆twarn H2O) = (mcool H2O x ccool H2O x ∆tcool H2O) - [22.8 g x 4.184 J/g oC x (Tmix - 74.6oC)] = [14.3 g x 4.184 J/g oC x (Tmix -
24.3oC)] - [95.3952 J/oC x (Tmix - 74.6oC)] = [59.8312 J/ oC x (Tmix - 24.3oC)] Tmix = 55.2oC 2. ql↔s = m x ∆Hfusion = 54.3 g x 0.334 kJ/g = 18.14 kJ (since heat is removed)
= - 18.14 kJ Question 3 pts
You may find the following resources helpful:
Scientific Calculator Periodic Table
Equation Table Download Equation T able Show the calculation of the ΔH of the reaction if 20.7 g of S is reacted with excess O2 to yield 255.6 kJ and sulfur trioxide by the following reaction equation. Report your answer to 4 significant figures. 2 S (s) + 3 O2 (g) → 2 SO3 (g)
Your Answer:This study source was downloaded by 100000873979981 from CourseHero.com on 04-09-2024 14:08:40 GMT -05:00
https://www.coursehero.com/file/142186874/Portage-Chem-103-Mod-3-Examdocx/
