Find the change of mass (in grams) resulting from the...

Find the change of mass (in grams) resulting from the release of heat when $1 \mathrm{~mol} \mathrm{SO}_{2}$ is formed from the elements.
$$
\mathrm{S}(s)+\mathrm{O}_{2}(g) \longrightarrow \mathrm{SO}_{2}(g) ; \Delta H=-297 \mathrm{~kJ}
$$

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Key Concepts

Mass-Energy Equivalence

Mass-energy equivalence is a fundamental concept in physics encapsulated by Einstein’s equation E = mc². It states that energy and mass are interchangeable, meaning that any change in energy in a system corresponds to a change in mass, even if that mass change is typically extremely small.

Chemical Reaction Enthalpy

Chemical reaction enthalpy refers to the heat change during a chemical reaction occurring at constant pressure. In exothermic reactions, such as those releasing heat to the surroundings, the negative enthalpy change indicates energy loss, which according to mass-energy equivalence, corresponds to a loss in mass.

Unit Conversion of Energy

Accurate calculations in thermodynamics and mass-energy equivalence require consistent energy units. Converting energy values into joules, for example from kilojoules, ensures that the energy scale aligns with the units used in standard equations like E = mc², allowing for correct calculation of mass changes.

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