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
Yuki888 [10]
4 years ago
11

How much heat is evolved in converting 1.00 mol of steam at 140.0 ?C to ice at -45.0 ?C? The heat capacity of steam is 2.01 J/(g

??C) and of ice is 2.09 J/(g??C).
Chemistry
1 answer:
Serhud [2]4 years ago
5 0
The chemical formula for steam is H2O(g)

mass of steam = mole of steam * molar mass of H2O
= 1 * (1*2+16) = 18 g

by E = m * c * change in temperature,
From 140C steam to 100C steam
18 * 2.01 * (140-100) = 1447.2J

latent heat of vaporization of water = 2.26x10^6 J/kg* 0.018 = 40680 J

From 100C water to 0C water
18 * 4.2 * (100-0) = 7560 J

latent heat of fusion of ice = 334 J/g * 18 g = 6012 J

From 0C ice to -45C ice
18 * 2.09 * (45-0)
= 1692.9 J

1447.2 + 40680 + 7560 + 6012 + 1692.9 = 57392.1 J
You might be interested in
What is the percent yield for a chemical reaction if the actual yield is 36 g and the theorical yield is 45 g.
SpyIntel [72]

Answer:

⇒ Percent yield = 80 %

Explanation:

Given:

Actual yield = 36 g

Theoretical yield = 45 g

Find:

Percent yield

Computation:

⇒ Percent yield = [Actual yield / Theoretical yield] 100%

⇒ Percent yield = [36 / 45] 100%

⇒ Percent yield =[0.8] 100%

⇒ Percent yield = 80 %

4 0
3 years ago
The atomic number of an atom is based upon the number of​
kolezko [41]
The atomic number of an element is based on the number of protons in the atomic nuclei of its atoms.
7 0
3 years ago
Read 2 more answers
How many moles are in a sample of 4.57 x 10^24 atoms of neon (Ne)?
balu736 [363]

Hello!

To find the number of moles in a sample of 4.57 x 10^24 atoms, we need to use Avogadro's number, which is 1 mole = 6.02 x 10^23.

To find how many moles, we divide the given sample by Avogadro's number.

(4.57 x 10^24) / (6.02 x 10^23) ≈ 7.59136

Using the amount of significant figures given (3), the answer is 7.59 moles of neon (Ne).

4 0
3 years ago
A student lives in a place that receives lots of snow and ice during the winter. The student has observed that the highway depar
Harlamova29_29 [7]
<span>A. Salt lowers the freezing point of water, which makes the melted snow on the road less likely to form ice.</span>
4 0
4 years ago
Read 2 more answers
Youll get brainliest !!!
mote1985 [20]
This is a characteristic of a Thermosetting polymer.
7 0
4 years ago
Other questions:
  • Mudcracks result from:
    10·2 answers
  • Which of the following describes a covalent bond?
    5·2 answers
  • What is an oxidation number?
    10·1 answer
  • The amount of dissolved oxygen that seawater can hold in solution will be greater in
    5·1 answer
  • Standard pressure is 101.3 KPa, which is equal to 760.o mmHg. If gas has a pressure of 545 mmHg, what is its pressure in KPa to
    6·1 answer
  • The half life of a certain substance is 28 years. how long will it take for a sample of this substance to decay to 78% of its or
    9·1 answer
  • How many atp molecules are produced during glycolysis?
    8·1 answer
  • Describe four ways by which organisms reproduce asexually
    6·1 answer
  • Please help i am losing motivation and very depressed please look at photo and answer.
    9·1 answer
  • Name an element with ll protons
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!