Portage LearningCHEM 103Module 3 Problem Set 1 latest update

Portage LearningCHEM 103Module 3 Problem Set 1 latest
update


Module 3
Problem Set 1
Question 1
Not yet graded / 0 pts

1. Show the calculation of the final temperature for a 20.8 gram piece of
iron heated to 100oC which has been added to a 55.3 gram sample of
water at 25.3oC in a coffee cup calorimeter.

c (water) = 4.184 J/g oC; c (Fe) = 0.449 J/g oC
Your Answer:

-
(mFe x cFe x ∆tFe) = (mH2O x cH2O x ∆tH2O)

- [20.8 g x 0.449 J/g oC x (Tmix - 100oC)] = [(55.3 g x 4.184 J/g oC x (Tmix -
25.3oC)]
- [9.3392 J/oC x (Tmix - 100oC)] = [(231.3752 J/oC x (Tmix - 25.3oC)]

Tmix = 28.2oC

Question 2
Not yet graded / 0 pts

2. Show the calculation of the final temperature of the mixture when a
40.5 gram sample of water at 85.7oC is added to a 36.8 gram sample of
water at 26.3oC in a coffee cup calorimeter.

c (water) = 4.184 J/g oC
Your Answer:
-
(mwarn H2O x cwarn H2O x ∆twarn H2O) = (mcool H2O x ccool H2O x ∆tcool H2O)

- [40.5 g x 4.184 J/g oC x (Tmix - 85.7oC)] = [(36.8 g x 4.184 J/g oC x (Tmix -
26.3oC)]
- [169.452 J/oC x (Tmix - 85.7oC)] = [(153.9712 J/oC x (Tmix - 26.3oC)]

Tmix = 57.4oC

Question 3
Not yet graded / 0 pts
Portage LearningCHEM 103Module 3 Problem Set 1 latest
update

, Portage LearningCHEM 103Module 3 Problem Set 1 latest
update
3. Show the calculation of the energy involved in condensation of 150
grams of steam at 100oC if the Heat of Vaporization for water is 2.26 kJ/g.




Portage LearningCHEM 103Module 3 Problem Set 1 latest
update