Chemistry Pre Lab Questions Assignment

Anonymous
timer Asked: Apr 10th, 2019
account_balance_wallet $10

Question Description

Need help with chemistry pre lab questions thank you

Attachment preview

If a 375 mL sample of water was cooled from 27.5C to 0C, how much heat was lost (in joules)?

Chemistry Pre Lab Questions Assignment
35047b97_3a47_40be_920a_e4671b793ea9.jpeg

Unformatted Attachment Preview

Tutor Answer

madushan
School: Purdue University

Attached.

Pre – Lab
1)
Applying
Q = mc∆T
m = density × Volume
m=

1g
× 375ml = 375g
ml

Q = mc∆T
Q = 375g ×

4.184J
× (0 − 37.5)℃
g℃

Q = −67696.9J
Heat loss was 67696.9 J

2)
∆Hrxn = −(mc∆T + Q calorimeter )
1g
4.184J
24.2J
∆Hrxn = −(300ml × ( ) ×
× (31.3 − 25.2) +
× (31.3 − 25.2)K)
ml
g℃
K
∆Hrxn = ...

flag Report DMCA
Review

Anonymous
Tutor went the extra mile to help me with this essay. Citations were a bit shaky but I appreciated how well he handled APA styles and how ok he was to change them even though I didnt specify. Got a B+ which is believable and acceptable.

Brown University





1271 Tutors

California Institute of Technology




2131 Tutors

Carnegie Mellon University




982 Tutors

Columbia University





1256 Tutors

Dartmouth University





2113 Tutors

Emory University





2279 Tutors

Harvard University





599 Tutors

Massachusetts Institute of Technology



2319 Tutors

New York University





1645 Tutors

Notre Dam University





1911 Tutors

Oklahoma University





2122 Tutors

Pennsylvania State University





932 Tutors

Princeton University





1211 Tutors

Stanford University





983 Tutors

University of California





1282 Tutors

Oxford University





123 Tutors

Yale University





2325 Tutors