Methanol (CH₃OH) is used as a fuel in race cars. (c) Calculate the heat produced by combustion per liter of methanol. Methanol has a density of 0.791 g/mL.

검증된 단계별 안내

Determine the balanced chemical equation for the combustion of methanol: \( 2 \text{CH}_3\text{OH} + 3 \text{O}_2 \rightarrow 2 \text{CO}_2 + 4 \text{H}_2\text{O} \).

Find the molar mass of methanol (CH₃OH) by adding the atomic masses of its constituent atoms: C, H, and O.

Calculate the number of moles of methanol in 1 liter using its density: \( \text{Density} = 0.791 \text{ g/mL} \), so \( 1 \text{ L} = 1000 \text{ mL} \).

Use the enthalpy change of combustion for methanol (usually given or found in tables) to find the total heat produced by the moles of methanol calculated in the previous step.

Convert the heat produced from moles to per liter by using the relationship between moles and volume derived from the density.

비슷한 문제에 대한 검증된 영상 답변:

이 영상 해법은 위 문제에 도움이 된다고 튜터들이 추천한 것입니다.

영상 길이:

주요 개념

질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.

Combustion Reaction

A combustion reaction is a chemical process in which a substance (usually a hydrocarbon) reacts with oxygen to produce heat, light, carbon dioxide, and water. In the case of methanol (CH3OH), the combustion reaction can be represented as CH3OH + 1.5 O2 → CO2 + 2 H2O, releasing energy. Understanding this reaction is crucial for calculating the heat produced during combustion.

Heat of Combustion

The heat of combustion is the amount of energy released when a specific amount of fuel is burned completely in oxygen. It is typically expressed in kilojoules per mole (kJ/mol). For methanol, this value can be found in tables of thermodynamic data, and it is essential for determining the total heat produced per liter of methanol during combustion.

Density and Volume Conversion

Density is defined as mass per unit volume and is crucial for converting between the mass of a substance and its volume. In this case, the density of methanol (0.791 g/mL) allows us to calculate the mass of methanol in a given volume (e.g., 1 liter). This conversion is necessary to relate the volume of methanol used to the heat produced during its combustion.

Methanol (CH3OH) is used as a fuel in race cars. (c) Calculate the heat produced by combustion per liter of methanol. Methanol has a density of 0.791 g/mL.