Hydrogen peroxide can decompose to water and oxygen by the following reaction:

2h2o2 (l) 2h2o(l) + o2(g) enthalpy= -196kj

calculate the value of q when 5.00g of h20(l) decomposes at constant pressure.

The amount of heat released for the given amount of hydrogen peroxide is 14.7 kJ.

Explanation:

To calculate the number of moles, we use the equation:

Given mass of = 5.00 g

Molar mass of = 34 g/mol

Putting values in above equation, we get:

The chemical equation for the reaction of decomposition of hydrogen peroxide follows:

By Stoichiometry of the reaction:

For every 2 moles of hydrogen peroxide, the amount of heat released is 196 kJ.

So, for every 0.15 moles of hydrogen peroxide, the amount of heat released will be =

Hence, the amount of heat released for the given amount of hydrogen peroxide is 14.7 kJ.

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