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sergij07 [2.7K]
2 years ago
12

1. Which phase change is accompanied by the release of heat? A) H20(s)--> H2O(g) B) H20(l) ->H2O(s) C) H20(l)→ H2O(g) D) H

2O(s) -> H20(l)​
Chemistry
1 answer:
docker41 [41]2 years ago
5 0

Answer:

B, liquid to solid.

Explanation: Since heat is being released, the particles for H2O would clump up. Heat is basically being taken out.

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A mixture of 5L of H2 and 3L O2 reacts to form H2O (g) at constant T and P .Find the
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The  volume of H₂O = 5 L

<h3>Further explanation</h3>

Given

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Reaction

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Required

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Solution

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mol H₂ = 5, mol O₂ = 3

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From equation, mol ratio H₂ : O₂ = 2 : 1, so :

\tt H_2\div O_2=\dfrac{mol~H_2}{coefficient}\div \dfrac{mol~O_2}{coefficient}\\\\=\dfrac{5}{2}\div \dfrac{3}{1}=2.5\div 3\rightarrow H_2~limiting~reactant(smaller~ratio)

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mol H₂O based on mol H₂, and from equation mol ratio H₂ : H₂O=2 : 2, so mol H₂O = 5 mol and the volume also 5 L

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When salt dissolves in water, the water molecules are attracted by dissolves salt particles. This attraction is called dissociation.

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