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
skad [1K]
2 years ago
12

Someone pls help me ::/:/

Chemistry
1 answer:
Eddi Din [679]2 years ago
5 0

Answer:

136 KJ

Explanation:

We'll begin by calculating the heat required to melt the ice. This can be obtained as follow:

Mass (M) = 250 g

Heat of fusion (Hբ) = 334 J/gºC

Heat (Q₁) required to melt the ice =?

Q₁ = MHբ

Q₁ = 250 × 334

Q₁ = 83500 J

Next, we shall determine the heat required to change the temperature. This can be obtained as follow:

Mass (M) = 250 g

Initial temperature (T₁) = 0 °C

Final temperature (T₂) = 50 °C

Specific heat capacity (C) = 4.184 J/gºC

Heat (Q₂) required to change the temperature =?

Q₂ = MC(T₂ – T₁)

Q₂ = 250 × 4.184 (50 – 0)

Q₂ = 1046 × 50

Q₂ = 52300 J

Next, we shall determine the total heat required.

Heat (Q₁) required to melt the ice = 83500 J

Heat (Q₂) required to change the temperature = 52300 J

Total heat (Qₜ) required =?

Qₜ = Q₁ + Q₂

Qₜ = 83500 + 52300

Qₜ = 135800 J

Finally, we shall convert 135800 J to KJ. This can be obtained as follow:

1000 J = 1 KJ

Therefore,

135800 J = 135800 J × 1 KJ / 1000 J

135800 J ≈ 136 KJ

Thus, the total heat required is 136 KJ.

You might be interested in
HELP PLEASE I NEED HELP THANKS I LOVE U
Pani-rosa [81]

Answer:

0.500-Molarity solution

Explanation:

4 0
3 years ago
What is the name of this hydrocarbon? 2-dimethylyne 2-methylbutane 4-methylbutene 4,3-methylbutyne 4,4-methylbutane
Alisiya [41]
You have shown no structure, still we can work out for the answer :).

First Option: <span>2-dimethylyne: This name is incorrect, because it does not contain any parent chain name. 

Second Option: </span><span>2-methylbutane: I have drawn its structure below, compare it with your structure.

Third Option: </span>4-methylbutene:<span> I have drawn the structure for this name. But this name is also against IUPAC rules, and its correct name is 1-Pentene.

Fourth Option: </span><span>4,3-methylbutyne: Again incorrect name, 4,3 are two positions, but here only one substituent is given (methyl). I have drawn structure of 3,4-Dimethylbutene, this name is incorrect, and the correct name for this compound is 3-Methyl-1-pentene.

Fifth Option: </span><span>4,4-methylbutane: Again incorrect name, 4,4 means at 4 position two substituents, but in name only methyl is given. Anyhow lets make it two and draw a structure, for 4,4-Dimethylbutane. Ooops!! This name is also incorrect, and the correct name for this compound is 2-Methylpentane.

Result:
           Among all options only, option B (2-Methylbutane) is correctly named, and this will be the correct name for the structure given to you. </span>

8 0
3 years ago
Read 2 more answers
Which of the following best explains why the oceanic crust is youngest at the oceanic ridges?
murzikaleks [220]

Answer:

the different depths of the ocean

5 0
3 years ago
Read 2 more answers
Pressure is inversely related to?
jekas [21]
Pressure is inversely related to temperature
6 0
3 years ago
Why is Cellular Respiration so important?
Nesterboy [21]
I say it’s A. Hopefully
5 0
3 years ago
Other questions:
  • Water and minerals move up the xylem because of a vacuum created by _____.
    10·1 answer
  • The process that occurs when physical forces break rock into smaller pieces without changing the rock's chemical composition is
    5·1 answer
  • Write a balanced chemical equation based on the following description:
    9·1 answer
  • Why are groups 1 and 2 referred to as the s-block of the periodic table
    12·1 answer
  • What is an isotope and how does their abundance in nature differ from element to element
    10·1 answer
  • Categorize the following reaction as an acid-base neutralization, precipitation, combination, decomposition, combustion, displac
    7·1 answer
  • What is the mass number of 19/9F?<br> Your answer:<br> A. 9<br> B. 10<br> C. 19<br> D. 28
    7·1 answer
  • When DNA replicates, the genes in the new strand are the orginal strand.
    5·2 answers
  • Bari oxit có công thức hóa hóa học là BaO . vậy bari oxit được tạo nên từ các nguyên tố
    7·1 answer
  • I need help with this pls help
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!