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lana66690 [7]
3 years ago
15

1) If you transfer energy into two solid substances, which do you think would melt first: a substance with stronger molecular at

traction or a substance with weaker molecular attraction?
2) If you transfer energy out of two substances in the gas phase, which do you think would condense first: a substance with stronger molecular attraction or a substance with weaker molecular attraction?

PLEASE HELP
Chemistry
1 answer:
skad [1K]3 years ago
8 0

Answer:

1) A substance with a weaker molecular attraction would melt first.

2) A substance with stronger molecular attraction would condense first.

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Identify the conjugate acid/base pairs in each of the following equations:
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Answer:

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Explanation:

When an acid loses its proton (H⁺), a conjugate base is produced.

When a base accepts a proton (H⁺), it forms a conjugate acid.

(a) H₂S is an acid. When it loses a proton, it forms the conjugate base HS⁻.

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Answer:

Value of equilibrium constant is 0.0888

Explanation:

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Initially no NH_{3} and CO_{2} were present.

Hence mole fraction of NH_{3} and CO_{2} at equilibrium can be calculated from coefficient of NH_{3} and CO_{2} in balanced equation.

Mole fraction of NH_{3} = (number of moles of NH_{3})/(total number of moles of NH_{3} and CO_{2}) = \frac{2moles}{(2+1)moles}=\frac{2}{3}

Mole fraction of CO_{2} = (number of moles of CO_{2})/(total number of moles of NH_{3} and CO_{2}) = \frac{1moles}{(2+1)moles}=\frac{1}{3}

Let's assume both CO_{2} and NH_{3} behaves ideally.

Therefore partial pressure of NH_{3}, P_{NH_{3}}= x_{NH_{3}}.P_{total} and P_{CO_{2}}= x_{CO_{2}}.P_{total}

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So, P_{NH_{3}}=\frac{2}{3}\times 0.843atm=0.562atm

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So, K_{p}=P_{NH_{3}}^{2}.P_{CO_{2}}=(0.562)^{2}\times 0.281=0.0888

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