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3 years ago

Which changes can reach dynamic equilibrium

Chemistry

1 answer:

soldier1979 [14.2K]3 years ago

5 0

Answer:

D - chemical and physical

Explanation:

Only chemical and physical changes can reach the level of dynamic equilibrium. Nuclear reactions cannot reach dynamic equilibrium.

A system is in dynamic equilibrium when the rate of forward reaction is the same as that of backward reaction in a reversible reaction.
Nuclear reactions cannot be reversed.
Dynamic equilibrium is prominent in chemical reactions. It is commonly found that as a reaction occurs, the backward and forward reactions can reach equilibrium levels.
In physical changes, this can also occur when certain conditions of pressure and temperatures are satisfied.

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How many grams of water at 50◦c must be added to 16 grams of ice at −12◦c to result in only liquid water at 0◦c?

melisa1 [442]

When water at 50 C is added to ice at -12 C, heat is transferred from hot water to ice.

- Heat given out by water = Heat absorbed by ice

Calculating the heat released by hot water:

$q = m Cwater$ ΔT $q = m (4.184\frac{J}{(g.^{0}C)} )$ $(0^{0}C-50^{0}C)$

Calculating heat absorbed by 16 g of ice: Ice at $-12^{0}C$ is converted to ice at $O^{0}C$ and then ice at $O^{0} C$ to water at $0^{0}C$

$q = m Cice$ ΔT + $m (Heat of fusion)$

$q = 16 g(2.11\frac{J}{g.^{0}C})(0^{0}C - (-12^{0}C))$ + $16 g (333.55\frac{J}{g})$

q = 405.12 J +5336.8 J =5741.92 J

- Heat given out by water = Heat absorbed by ice

-( $m(4.184\frac{J}{g.^{0}C})(0^{0}C-50^{0}C) = 5741.92 J$

m = 27.4 g

Therefore, 27.4 g water at $50^{0}C$ must be added to 16 g of ice at $-12^{0}C$ to convert to liquid water at $0^{0}C$

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3 years ago

How many elements does hydrochloric acid have

Mars2501 [29]

Answer:

Hydrogen chloride (HCl), a compound of the elements hydrogen and chlorine, a gas at room temperature and pressure. A solution of the gas in water is called hydrochloric acid.

Explanation:

hoped that helped

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2 years ago

What are three of Leonardo divinci's contributions to science?

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<span> hydraulic pumps, flying machines, and war machines.</span>

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3 years ago

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Explanation:

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describe the general trend in electronegativity as metals in group 2 on the periodic table are concidered in order of increasing

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Answer:

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Explanation:

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