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lina2011 [118]
3 years ago
12

Which of the following is an exothermic reaction?

Chemistry
2 answers:
Alika [10]3 years ago
4 0
I think the correct answer among the choices listed above is option B. Condensation is a process which an exothermic one. Exothermic processes involves heat being released to the environment which is evident in the process of condensation.
Sauron [17]3 years ago
3 0

<u>Answer:</u> The correct answer is Option B.

<u>Explanation:</u>

Exothermic reaction is defined as the reaction in which heat is released to the surroundings from the system. The total enthalpy change of the reaction comes out to be negative.

Endothermic reactions are the ones where heat is absorbed from the surrounding by the system. The total enthalpy change of this reaction comes out to be positive.

For the given options:

<u>Option A:</u> When ammonium nitrate is added in the water to cool it, the heat is getting absorbed. Then only the water is getting cooled. Thus, it is considered as an endothermic reaction.

<u>Option B:</u> Condensation is a process in which gaseous state changes into liquid state. The temperature of the system gets reduced and thus heat is getting released in this process. Thus, it is considered as an exothermic reaction.

<u>Option C:</u> Melting is a physical process in which solid state is converted into liquid state. To do this, heat must be provided to separate the particles from one another. Thus, it is considered as an endothermic reaction.

<u>Option D:</u> When sugar is dissolved in water, heat is provided so that it gets completely dissolved. Thus, it is considered as an endothermic reaction.

Hence, the correct answer is Option B.

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6. Consider the reaction: CzHo (g) + 02 (8) - 4 CO2(g) + 6H2O (1)
deff fn [24]

Answer:

1120 gm

Explanation:

6. Consider the reaction: CzHo (g) + 02 (8) - 4 CO2(g) + 6H2O (1)

(a) Balance the equation.

(b) How many grams of oxygen are required to react with 10 moles of ethane for a complete

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FIRST, CORRECT THE EQUATION THEN BALANCE

2C2H6(G) + 7O2------------>  4CO2  + 6H2O

so for 10 moles of ethane, we need

7 X 5 = 35 MOLES O2

=35 MOLES O2

O2 HAS A MOLAR MASS OF 2X16 = 32 gm

35 MOLES OF O2 HAS A MASS OF 35 X 32 =1120 gm

6 0
2 years ago
Can you help please??
hram777 [196]

Answer:

no

Explanation:

7 0
2 years ago
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Can Neon form any compounds?
Lana71 [14]

even tho the guy copied the answer its true neon can form a compound

5 0
3 years ago
Please help! It’s due today. I’ll give brainliest
MArishka [77]

Answer:

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Explanation:

5 0
2 years ago
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Using the equation, C5H12 + 8O2 Imported Asset 5CO2 + 6H2O, if an excess of pentane (C5H12) were supplied, but only 4 moles of o
ser-zykov [4K]
Answer: 3 <span>moles of water would be produced in present case.
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Reason:
Reaction involved in present case is:
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In above reaction, 1 mole of C5H12 reacts with 8 moles of oxygen to give 6 moles of water.

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7 0
3 years ago
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