Reactivity 1 : What drives chemical reactions?

What drives Chemical Reactions?

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What drives Chemical Reactions?

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5.35g of solid ammonium chloride, NH₄Cl(s), was added to water to form 25.0g of solution.

The specific heat capacity of aluminium is 0.900 Jg^–1K^–1.

Which processes are exothermic?

Ethyne, like ethene, undergoes hydrogenation to form ethane.

Reactivity 1 : What drives chemical reactions?

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5.35g of solid ammonium chloride, NH₄Cl(s), was added to water to form 25.0g of solution. The maximum decrease in temperature was 14 K. What is the enthalpy change, in kJmol^-1, for this reaction? (Molar mass of NH₄Cl = 53.5gmol^-1; the specific heat capacity of the solution is 4.18 Jg^-1K^-1)

$Δ H = + \frac{25.0 \times 4.18 \times (14 + 273)}{0.1 \times 1000}$

$Δ H = - \frac{25.0 \times 4.18 \times 14}{0.1 \times 1000}$

$Δ H = + \frac{25.0 \times 4.18 \times 14}{0.1 \times 1000}$

$Δ H = + \frac{25.0 \times 4.18 \times 14}{1000}$

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