Chemistry, 11.07.2019 11:30 nmadrigal

Write the balanced chemical equations for the decomposition of solid calcium hydroxide into solid calcium (ii) oxide (lime) and water vapor. express your answer as a balanced chemical equation. identify all of the phases in your answer.

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A balanced chemical equation is the equal number of atoms of the same element on both sides of the reaction. The balanced chemical reaction is, $\rm Ca(OH)_{2}(s) \rightarrow CaO(s) + H_{2}O(g)$ .

What is decomposition reaction?

Decomposition is a chemical reaction in which a single reactant decomposes or breaks to produce two or more products.

Solid calcium hydroxide $(\rm Ca(OH)_{2})$ decomposes to form solid calcium (ii) oxide (lime) $(\rm CaO)$ and water vapour $(\rm H_{2}O)$

The decomposition of the reactant is an endothermic reaction and its 1 mole produces 1 mole of each reactant. The balanced chemical reaction can be given as,

$\rm Ca(OH)_{2}(s) \rightarrow CaO(s) + H_{2}O(g)$

Therefore, the balanced chemical reactions have the same and equal atoms on both sides.

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Answer from: noaheault

Calcium oxide (CaO) or lime in solid form can be prepared from the decomposition of calcium hydroxide {Ca $(OH)_{2}$ in to lime (CaO) and water ( $H_{2}O$ at high temperature. The reaction is an endothermic reaction. That is heat is absorbed in this reaction process. One mole of calcium hydroxide decomposed into one mole of calcium oxide and one mole of water. The balanced reaction can be shown as-CaC $O_{3}$ (solid) → CaO (solid) + $H_{2}O$ (liquid). The heat of the reaction is (+) 63.7 kJ/mole of CaO.

Answer from: Quest

definition

entropy is a measure of the randomness or the extent of disorder of a chemical process.

enthalpy is a measure of the heat change of a reaction occurring at a constant pressure.

measurement units:

entropy is measured in joule per kelvin (jk⁻¹) whereas enthalpy is measured in joule per mole (jmol⁻¹)

requirements:

entropy has no requirements or limits, and its change is measured by the division between the heat change of the chemical process and the temperature.

in contrast, enthalpy can only be related to the heat change of the reaction under standard conditions.

Answer from: Quest

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