1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Alchen [17]
3 years ago
11

A 13.1-g sample of CaCl2 is dissolved in 104 g of water, with both substances at 24.7°C. Calculate the final temperature of the

solution assuming no heat loss to the surroundings and assuming the solution has a specific heat capacity of 4.18 J °C−1 g−1.
Chemistry
1 answer:
likoan [24]3 years ago
7 0

Answer:

The final temperature of the solution is 44.8 °C

Explanation:

assuming no heat loss to the surroundings, all the heat of solution (due to the dissolving process) is absorbed by the same solution and therefore:

Q dis + Q sol = 0

Using tables , can be found that the heat of solution of CaCl2 at 25°C (≈24.7 °C)  is q dis= -83.3 KJ/mol . And the molecular weight is

M = 1*40 g/mol + 2* 35.45 g/mol = 110.9 g/mol

Q dis = q dis * n  = q dis * m/M =  -83.3 KJ/mol * 13.1 g/110.9 gr/mol = -9.84 KJ

Qdis= -9.84 KJ

Also Qsol = ms * Cs * (T - Ti)

therefore

ms * Cs * (T - Ti) + Qdis = 0

T=  Ti - Qdis * (ms * Cs )^-1   =24.7 °C - (-9.84 KJ/mol)/[(104 g + 13.1 g)* 4.18 J/g°C] *1000 J/KJ

T= 44.8 °C

You might be interested in
0.315 to scientific notation
irga5000 [103]

Answer:

3.15 × 10^-1

or

3.15E-1

Explanation:

7 0
3 years ago
Read 2 more answers
Why is there no set path that a scientific inquiry must follow
Marina CMI [18]
Due to the variables that each inquiry has, Scientific inquiry follows a path of questioning and testing a hypothesis, however this changes in response to specific details. 
6 0
3 years ago
Read 2 more answers
Ignoring sign which transition is associated with the greatest energy change?
scoray [572]
Well u said ignoring not me

3 0
3 years ago
What are two ways that substances can pass through a cell membrane out of the cell
Paha777 [63]

Answer:

Passive transport, and Active transport

Explanation:

Do u need an explanation?

If so you can tell me and I'll edit it

Hope this helped a little!

3 0
3 years ago
There are many ways that you can tell whether a chemical change has occurred. Which of the following is NOT a sign of chemical c
Vesnalui [34]

Answer:

liquid bolling

Explanation:

because it just using heat.

7 0
3 years ago
Read 2 more answers
Other questions:
  • URGENT which statement describes a chemical property of hydorgen gas
    14·2 answers
  • PLEASE HELP MEEE!!!!
    12·1 answer
  • What natural method of separating mixtures happens in reservoirs over a long period of time?
    8·1 answer
  • A horizontal tube carrying hot water has a surface temperature of 355.4 K and an outside diameter
    12·1 answer
  • What is charge of electron,proton
    5·1 answer
  • What state of matter having a definite volume but no definite shape
    13·2 answers
  • What is the molar mass of Aluminum chromate
    7·1 answer
  • Why does a metal bond with a non-metal in ionic bondings?? ASAP please
    12·1 answer
  • heeellllllllllllllllllllllpppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppp
    12·1 answer
  • An exacuted glass vessel weighs 50 g when empty, 148g when filled with an liquid of density o.989/cc and 50.5 g whenfilled with
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!