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
A trophic level is a number that tells you the position an organism occupies in a food chain or food pyramid.
svet-max [94.6K]

Answer:

true

Explanation:

8 0
3 years ago
Why does ice float?​
Trava [24]

Ice is less dense than water. Hydrogen bonding makes water more dense than when it is in the form of ice!

[email protected]@dow

3 0
3 years ago
Read 2 more answers
How do you calculate the density of a gas, based on its temperature and pressure?
stiks02 [169]
We can rearrange the ideal gas equation:
PV = nRT, where n is the number of moles equivalent to:
n = mass / Mr
PV = mRT/Mr
m/V = PMr/RT
density = PMr / RT; where Mr and R are constant.
5 0
3 years ago
Why are thiols more nucleophilic than alcohols?
Roman55 [17]

Answer:

Thiols contain stronger acids than alcohols

Explanation:

4 0
2 years ago
Read 2 more answers
Why is a cis-1,3-disubstituted cyclohexane more stable thanits<br> trans isomer?
anzhelika [568]

Answer:

Explanation has been given below

Explanation:

  • In diaxial conformation of cis-1,3-disubstituted cyclohexane, 4 gauche-butane interactions along with syn-diaxial interaction are present. Hence it readily gets converted to diequitorial conformation where no such gauche-butane interaction is present
  • In two possible conformations of trans-1,3-disubstituted cyclohexane, 2 gauche-butane interactions are present in each of them.
  • Hence cis-1,3-disubstituted cyclohexane exists almost exclusively in diequitorial form. But trans-1,3-disubstituted cyclohexane has no such option.
  • Trans-1,3-disubstituted cyclohexane experiences gauche butane interaction in each of the two conformations.
  • Therefore cis-1,3-disubstituted cyclohexane is more stable than trans conformation

5 0
3 years ago
Other questions:
  • You are balancing an ionic compound. Let's call it: AB.
    9·1 answer
  • Hakim used 18000J of energy to climb up to the top of a building in 10 mins. calculate the power he developed in climbing up to
    10·1 answer
  • How do S and P waves move through a solid material?
    14·1 answer
  • You wish to prepare a tape-casting slip containing 50 vol% Al2O3 and 50 vol% polyvinyl butyral (PVB) binder. If the density of A
    9·1 answer
  • Which statement about the earth atmosphere is true
    6·1 answer
  • 1) Recall the two written definitions of an oxidation-reduction reaction provided in our lessons. Which of these definitions is
    13·1 answer
  • If different masses of water are heated to the same temperature, which sample will absorb more energy? Base your argument on the
    12·1 answer
  • What is the wavelength of a 2.99 Hz wave?
    15·1 answer
  • Can yall answer the question on the image PLEASE
    15·1 answer
  • 1. Except for special cases such as peroxides, oxygen has an oxidation number of _______ in compounds. A. +2 B. –1 C. +1 D. –2
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!