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
aliina [53]
3 years ago
8

If 45.0 mL of ethanol (density =0.789g/mol) initially at 6.0°C mix with 45.0 mL of water (density =1.0 g/mol) initially at 28.0°

C in an insulated beaker, what is the final temperature of the mixture, assuming that no heat is lost? (CetOH =2.42 J/G C)

Chemistry
1 answer:
Likurg_2 [28]3 years ago
5 0

The final temperature of the mixture : 21.1° C  

<h3>Further explanation  </h3>

The law of conservation of energy can be applied to heat changes, i.e. the heat received / absorbed is the same as the heat released  

Q in(gained) = Q out(lost)  

Heat can be calculated using the formula:  

Q = mc∆T  

Q = heat, J  

m = mass, g  

c = specific heat, joules / g ° C  

∆T = temperature difference, ° C / K  

Q ethanol=Q water

mass ethanol=

\tt mass=\rho\times V\\\\mass=0.789\times 45=35.505~g

mass water =

\tt mass=1~g/ml\times 45~ml=45~g

then the heat transfer :

\tt 35.505\times 2.42~J/g^oC\times (t-6)=45\times 4.18~J/g^oC\times (28-t)\\\\85.922t-515.533=5266.8-188.1t\\\\274.022t=5782.33\rightarrow t=21.1^oC

You might be interested in
HELPP PLEASEE this is science btw!!
musickatia [10]

Answer:

5 environmental factors are

- Exposure to hazardous substances in the air, water, soil, and food.

- Natural and technological disasters.

- Climate change.

- Occupational hazards.

- The built environment.

Explanation:

3 0
3 years ago
Which is the correct Lewis dot structure of NH2-?
enot [183]

Answer:

A

Explanation:

because it can share and remain with ither electrons

5 0
3 years ago
PLEASE HELP ME!!!
Kazeer [188]

722391465.060241 MHz

sbbshahshaja

3 0
3 years ago
What ion does a base increase
cricket20 [7]
OH- is the ion that increases the concentration of a base
8 0
3 years ago
Two children on roller skates stand facing each other. The child on the right puts her arms out and pushes away from her partner
shutvik [7]

Answer:

They both go backward because of force.

Explanation:

The logic behind this answer is that child right and pushes away causing her to go backward meaning her partner is being pushed backwards to.

(Hope this was helpful!)

8 0
2 years ago
Other questions:
  • Fluorine gas is placed in contact with calcium metal at high temperatures to produce calcium fluoride powder. What is the formul
    7·2 answers
  • How many molecules are in 0.943 grams of water
    10·2 answers
  • aqueous solution containing 17.5 g of an unknown nonelectrolyte compound in 100. gof water has a freezing point of –1.8 oC. Calc
    14·2 answers
  • What is the difference between basis and basic​
    9·1 answer
  • 1. Which type of intermolecular attractive force operates between all molecules?
    12·2 answers
  • What is 4.50+3.4+12.09 ?​
    14·2 answers
  • is anyone willing to help me finish the last 10 pages of a chemistry packet(grade 11)? can offer money
    15·1 answer
  • Element X has an average atomic mass of 64.32 amu. If this element consists of only two isotopes, X-64 and X-65, which isotope i
    15·1 answer
  • Sodium combines with chlorine to produce sodium chloride formula equation and balanced ​
    8·1 answer
  • Please work out all the problems on this page, no links, no i don't knows please do not take advantage of me or my points please
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!