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8090 [49]
3 years ago
11

Which one of the following processes is endothermic? A) Boiling a liquid. B) Freezing a solid. C) Condensation of a gas into a l

iquid. D) Condensation of a gas into a solid.
Chemistry
1 answer:
lord [1]3 years ago
8 0

Answer:

D) Condensation of a gas into a solid.

Explanation:

An endothermic process is a process that absorbs heat from the surroundings.

A) Boiling a liquid.

This gives off heat to the surroundings. An exothermic process.

B) Freezing a solid.

In this process, the water releases heat to the surroundings, so it is an exothermic process

C) Condensation of a gas into a liquid.

As water vapor condenses into liquid, it loses energy in the form of heat. Therefore, this process is exothermic.

D) Condensation of a gas into a solid.

This process absorbs heat from the surrounding, hence it is an endothermic proccess.

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Answer:

The pOH of HNO₃ solution that ha OH⁻ concentration 9.50 ×10⁻⁹M is 8.

Explanation:

Given data:

[OH⁻] = 9.50 ×10⁻⁹M

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Solution:

pOH = -log[OH⁻]

Now we will put the value of OH⁻ concentration.

pOH = -log[9.50 ×10⁻⁹M]

pOH = 8

Thus the pOH of HNO₃ solution that ha OH⁻ concentration 9.50 ×10⁻⁹M is 8.

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\huge{ \color{black}{ \boxed{ \color{hotpink}{Answer}}}}

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Convert 2 butanol to 2 nitrobutane​
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The conversion of 2 - butanol to 2 - nitrobutane​ involves conversion of  2 butanol to 2 - bromobutane and subsequently to 2 - nitrobutane.

In order to convert 2 - butanol to 2 - nitrobutane​, an SN2 reaction is first carried out in which 2 - butanol  is converted to 2 - bromobutane. This reaction proceeds with inversion of configuration at the chiral carbon as expected.

This product is subsequently reacted with silver nitrite in ethanol to yield  2 - nitrobutane​ along side silver bromide. Some alkyl nitrite is also produced as a by product. The components of the mixture are separated by fractional distillation. The scheme of the reaction is shown in the image attached to this answer. This reaction is only applied to primary and secondary alkyl halides.

Learn more: brainly.com/question/10079361

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