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Answer :
Final answer:
When burning one mole of carbon, some mass is converted to energy, which is captured by the heat of combustion, but the actual mass change is so minuscule it's practically impossible to measure and is commonly considered negligible. Therefore the correct option a.
Explanation:
The student asks 'What mass is converted to energy when one mole of carbon is burned?' The correct answer is a. Insert Calculated Mass. This is because according to Einstein's equation, E=mc^2, some mass is converted into energy. However, the amount of mass converted in chemical reactions is so small that it is often considered negligible for most practical purposes. In the case of the combustion of carbon to CO2, the energy associated with the mass change is primarily measured as heat.
Identifying the mass change in the combustion of carbon is a complex task, often requiring precise measurements that are not typically performed due to the extremely small mass difference. Thus, we don't calculate the mass change directly but rather focus on the energy released during the reaction, which is expressed in calories or joules.
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