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
PIT_PIT [208]
3 years ago
10

After an afternoon party, a small cooler full of ice is dumped onto the hot ground and melts. If the cooler contained 6.60 kg of

ice and the temperature of the ground was 42.5 °C, calculate the energy that is required to melt all the ice at 0 °C. The heat of fusion for water is 80.0 cal/g.
Chemistry
1 answer:
gtnhenbr [62]3 years ago
5 0

Answer:

The quantity of heat required to melt all the ice at 0°C is 2.21 * 10⁶ J

Explanation:

Latent heat of fusion  is the heat absorbed by a unit mass of a given solid at its melting point that completely converts the solid to a liquid at the same temperature. Its unit is Joules/kg or Joules/g.

1 calorie = 4.184 Joules

Therefore , 80.0 cal/g = 80.0 cal/g * 4.184 J/cal = 334.72 J/g

1 g = 0.001 kg; Heat of fusion in J/kg = 334.72 J/g * 1g /0.001 kg = 3.35 * 10⁵ J/kg

Quantity of heat, Q = mass * latent heat of fusion of ice

quantity of heat required = 6.60 kg * 3.35 * 10⁵ J/kg

Quantity of heat required = 2.21 * 10⁶ J

Therefore, the quantity of heat required to melt all the ice at 0°C is 2.21 * 10⁶ J

You might be interested in
Fossil evidence sssssssssssssssssssssss
IRINA_888 [86]

Answer:

Fossils are essentially clues that have been left behind by various forms of living things. They are instrumental tools for understanding the diverse groups of organisms that have inhabited our planet at one time or another. A fossil is any preserved evidence of an organism.

i guess

Explanation:

5 0
3 years ago
Read 2 more answers
To measure the amount of iron in a certain type of iron ore, an analytical chemist dissolves a sample in strong acid and titrate
Fiesta28 [93]

Answer:

\% Fe=11.4\%

Explanation:

Hello!

In this case, for the described chemical reaction, we find it is:

8H^+(aq)+5Fe^{2+}(aq)+MnO_4^-(aq)\rightarrow 5Fe^{3+}(aq)+Mn^{2+}(aq)+4H_2O(l)

Because it says that the iron is dissolved in a strong acid which provides addition hydrogen ions to the reaction media. Thus, for the questions attached on the figure we find:

- This a REDOX reaction because we see iron is being oxidized from 2+ to 3+ and manganese reduced from +7 to +2.

- Since it is a redox reaction and the oxidized species is that undergoing an oxidation number increase, we evidence iron goes from +2 to +3, which means iron is the oxidized species.

- In this case, for the used 59.2 mL (0.0592 L) of the 0.2000 M solution of potassium permanganate, we can compute the consumed grams of iron via stoichiometry including the 5:1 mole ratio between them in the chemical reaction:

m_{Fe^{2+}}=0.0592L*0.2000\frac{molMnO_4^-}{L}*\frac{5molFe^{2+}}{1molMnO_4^-}  *\frac{55.85gFe^{2+}}{1molFe^{2+}} \\\\m_{Fe^{2+}}=3.31gFe^{2+}

It means that the percent of iron in that sample is:

\% Fe=\frac{3.31g}{29.00g} *100\%\\\\\% Fe=11.4\%

Best regards.

5 0
3 years ago
Examples of non polar covalent bonds
ikadub [295]

Answer:

# The simpliest is: H-H

# All gases formed by elements of the 7th group in the periodic table:

  F-F,   Cl-Cl, Br-Br, I-I

# In general, Covalent bonds formed between atoms of the same kind are usually non-polar.

Explanation:

Hope this answer will help you.

4 0
3 years ago
Direction: To compare and differentiate the animal and plant cell base on the presence and absence of certain organelles.Fill in
S_A_V [24]

Answer:

hi what are you doing

Explanation:

............

3 0
2 years ago
Which answer best describes this reaction?
Maksim231197 [3]
The photos for the reaction arent here so ill insert them below 

3 0
3 years ago
Read 2 more answers
Other questions:
  • Lake Victoria is the huge reservoir of the New Aswan High Dam?<br><br> True <br><br> False
    7·1 answer
  • 1. Find at least 3 elements named after countries
    15·1 answer
  • A. If you have a periodic table that is NOT color coded, describe WHERE to look on the periodic table to find elements which hav
    7·1 answer
  • Positive correlation means ________________. A. as one variable increases, the other variable decreases. B. variables become unr
    9·1 answer
  • Which two elements could form an ionic compound?
    10·1 answer
  • Which of the following is most likely to make a -3 ion?<br> Bі<br> P<br> Se<br> Be<br> All
    9·1 answer
  • 1) An unlabeled laboratory solution is found to contain a H+ ion concentration of 1 x 10-4
    15·1 answer
  • Mr. Jenson's class is observing the growth of one kind of pea plant.
    15·1 answer
  • In 6 months time, the Earth will revolve to the other side of the sun. During the June Solstice, the most
    14·1 answer
  • How can we increase the rate of collisions between the reactants in this reaction? mg 2hcl → mgcl2 h2
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!