Calculate the amount of energy released when Ethanol is burned.
See your post on burning CH4.
To calculate the amount of energy released when ethanol is burned, we need to use the concept of the heat of combustion. The heat of combustion, also known as the enthalpy change of combustion, is the energy released when one mole of a substance is completely burned in excess oxygen.
To calculate the energy released when burning ethanol, we need to know three key pieces of information:
1. The balanced chemical equation for the combustion of ethanol: C2H6O + 3O2 → 2CO2 + 3H2O
2. The molar mass of ethanol (C2H6O): The molar mass of C2H6O is calculated as (2 * atomic mass of C) + (6 * atomic mass of H) + (1 * atomic mass of O), where the atomic masses can be found on the periodic table.
3. The standard molar enthalpy of combustion of ethanol (∆Hc°): The standard molar enthalpy of combustion is the heat released per mole of ethanol burned. This value can be found in chemical reference books or online databases.
Once you have these three pieces of information, you can calculate the energy released using the following steps:
Step 1: Calculate the moles of ethanol burned.
- Divide the mass of ethanol burned by the molar mass of ethanol to obtain moles.
Step 2: Use the balanced chemical equation to determine the mole ratio between ethanol and energy released.
- For this equation, every 1 mole of ethanol burned releases ∆Hc° amount of energy.
Step 3: Calculate the total energy released.
- Multiply the moles of ethanol burned by the ∆Hc° value to obtain the energy released in joules or calories.
Remember to keep units consistent throughout your calculations.
Note: It's important to use the standard molar enthalpy of combustion (∆Hc°) to obtain an accurate value for the energy released. The value may vary slightly depending on factors such as temperature and pressure.