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
Molodets [167]
3 years ago
5

How much energy is required to increase the temperature of 36.0 g of H2O from –20 °C to 50 °C, keeping in mind the following: Vi

ce ≈ 2.00 J/g×C Liquid water ≈ 4.00 J/g×C ΔHfusion ≈ 6000 J/mol
Physics
1 answer:
Vlad1618 [11]3 years ago
3 0

Answer:

2.06 x 10⁴ J

Explanation:

The process takes place in three steps. First, the ice is heated from -20 °C to 0 °C. Then the ice undergoes a phase change to water. Finally, the water is heated from 0 °C to 50 °C.

The heat energy required for the first step is as follows:

Q = mcΔT = (36.0 g)(2.00 Jg⁻¹°C⁻¹)(0 °C - (-20 °C)) = 1440 J

The heat energy required for the phase change (where L is the heat of fusion) is then calculated. Grams are converted to moles using the molar weight of water (18.02 g/mol)

Q = ML = (36.0 g)(mol/18.02g)(6000 J/mol) = 11987 J

Finally, the heat energy required to raise the temperature of the water to 50°C is calculated:

Q = mcΔT = (36.0 g)(4.00 Jg⁻¹°C⁻¹)(50 °C - 0 °C) = 7200 J

Adding all of the heat energy values together gives:

(1440 + 11987 + 7200) J = 20627 J

The final answer is 2.06 x 10⁴ J

You might be interested in
How far will a man travel in 15 min driving his car down the highway at an average speed of 24 m/?s
emmasim [6.3K]

Answer:

21.6 km

Explanation:

15×60×24 = 21600 m

\frac{21600}{1000}= 21.6 km

7 0
3 years ago
Magnetic pole reversal worksheet
Likurg_2 [28]
??????????????????????
8 0
3 years ago
Just these 2 question. I have no idea what it's asking..​
Murljashka [212]

Answer: did you get the answers?

Explanation:

5 0
3 years ago
Describe Darwin’s<br> observations on the Galápagos islands<br> during his voyage on the HMS Beagle.
Helen [10]

Answer:

During the voyage Charles Darwin explored the Galapagos islands and noticed the same species have different adaptations in places. ... Charles noticed that each species has the same ancestor but they evolve to adapt over time so they can live longer.

Explanation:

4 0
3 years ago
What is the advantage of nuclear plants?
DerKrebs [107]

They emit low leavls of carbon dioxide (CO2) and the emissions of green house gases and therefore the contribution of nuclear power plants to global warming is therefore pretty little

8 0
2 years ago
Read 2 more answers
Other questions:
  • Is the 3 in the molecule a coefficient, subscript, or element? 3H₂O₂
    10·1 answer
  • The diagram shows that currently about 100 gigatons/year of carbon are moved from the atmosphere to vegetation on land. Which pr
    15·2 answers
  • Which of the following statements about electric field lines are true? (choose all that are true) a) They are only defined for p
    8·1 answer
  • Water on a smooth floor can made you slip, which means water is also a lubricant. Can you think of reasons why oil and grease an
    13·1 answer
  • Which units are used to express sound intensity? <br><br> Decibels <br> Hertz<br> Volts <br> Amperes
    10·1 answer
  • The crew of a cargo plane wishes to drop a crate of supplies on a target below. To hit the target, when should the crew drop the
    12·2 answers
  • Chord progressions that move to resting points that release tension are called
    13·1 answer
  • If we take away a lot of energy from a liquid what phase will it change to ?
    7·1 answer
  • The electric force is exerted by a 40-nC charged particle located at the origin of a Cartesian coordinate system on a 10-nC char
    13·1 answer
  • A 500 kg sack of coal falls vertically onto a 2000 kg railroad flatcar which was initially moving horizontally at 3 m/s. no exte
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!