If 31.5 g of LiBr are dissolved 350.0 g of water at 20.0 °C in an insulated container, a temperature change is observed. The ∆H of solution of LiBr is -48.8 kJ/mol. Assuming that the specific heat of the solution is 4.184 J/(g°C), and that no heat is gained or lost by the container, what will be the final temperature of the solution?

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
Chapter2: Atoms Molecules And Ions
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If 31.5 g of LiBr are dissolved 350.0 g of water at 20.0 °C in an insulated container, a temperature change is observed. The ∆H of solution of LiBr is -48.8 kJ/mol. Assuming that the specific heat of the solution is 4.184 J/(g°C), and that no heat is gained or lost by the container, what will be the final temperature of the solution?
 
 
L
(
31.5g Libr
350 H₂0
g₁
x
T
+
I molli Be
879 LiBr
87 g
17665600J =
+20
31.5g LiBr = 381.5
g
= 5 من ما 5 ماما 17-
387.5 g (4.184 89(OC))
-11067,3 =
TF
S
381.5g (41184 25°c) (TF - 20)
(TF-20)
-11647.3 = TE
1362 mol Libr
420
Solution
362 m LiBr-48.8kJ)
2
-17665645/ 10008
(1K5)
9 = -176656005
m² 38.5
S= 4.184 (9)
વ. ૪C)
TIF 20.0°C
TF=
°C
=717668.6
KT
-17665600 J
Transcribed Image Text:L ( 31.5g Libr 350 H₂0 g₁ x T + I molli Be 879 LiBr 87 g 17665600J = +20 31.5g LiBr = 381.5 g = 5 من ما 5 ماما 17- 387.5 g (4.184 89(OC)) -11067,3 = TF S 381.5g (41184 25°c) (TF - 20) (TF-20) -11647.3 = TE 1362 mol Libr 420 Solution 362 m LiBr-48.8kJ) 2 -17665645/ 10008 (1K5) 9 = -176656005 m² 38.5 S= 4.184 (9) વ. ૪C) TIF 20.0°C TF= °C =717668.6 KT -17665600 J
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