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23 Nov 2019

The enthalpy change for the reaction of hydrogen gas and oxygen gas to produce water is -285.8 kJ per mole of water formed.

Is the reaction exothermic or exothermic?

Is energy absorbed by the system or released by the system?

Calculate the enthalpy change for this reaction in kcal/mol

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Collen Von
Collen VonLv2
28 Feb 2019

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Related questions

Calcium hydroxide reacts with carbon dioxide to form calcium carbonate and water. The enthalpy change for this reaction is exothermic by 69.1 kJ.

What is the enthalpy change if 3.8 mol of calcium carbonate is formed?

a.

- 69 kJ

b.

+ 69 kJ

c.

- 260 kJ

d.

- 18 kJ

e.

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The standard enthalpy of formation of hydrogen peroxide is -187.8 kcal/mole (for the reaction H2(g) + O2(g) --> H2O2(l)). The standard enthalpy of formation of water is 285.8 kcal/mole (for the reaction H2(g) + 1/2O2(g) --> H2O(l)). Knowing this information, what is the standard enthalpy of reaction for the following reaction: H2O(l) + 1/2/O2(g) -- H2O2(l).

c) What would be the activation energy for the reverse reaction?

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