2)The combustion of one mole of methane, CH4 releases 890KJ mole or heat according to the following equation.
CH4+O2---->CO2+ 2H2O

Calculate the energy given off when 2moles of CH4 are burnt. (class 10 chemistry)

The combustion of one mole of methane (CH₄) releases 890 kJ of heat according to the equation:

\[
\text{CH}_4 + O_2 \rightarrow \text{CO}_2 + 2\text{H}_2\text{O}
\]

If 1 mole of methane releases 890 kJ of heat, then burning 2 moles of methane will release:

\[
2 \text{ moles of CH}_4 \times 890 \text{ kJ/mole} = 1780 \text{ kJ}
\]

Thus, the energy given off when 2 moles of CH₄ are burnt is **1780 kJ**.

Would you like further details on how combustion reactions work or the energy calculations?

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Here are 5 questions to deepen your understanding:
1. What is the balanced chemical equation for the combustion of methane?
2. How is the energy of a reaction related to moles in a chemical reaction?
3. What factors affect the heat released in combustion reactions?
4. How would you calculate energy for a fractional mole of methane?
5. What is the role of oxygen in combustion reactions?

**Tip:** Always make sure your chemical equations are balanced to get accurate calculations.

The combustion of one mole of methane, CH4 releases 890KJ mole of heat according to the following equation: CH4 + O2 → CO2 + 2H2O. Calculate the energy given off when 2 moles of CH4 are burnt.

Learn how to calculate the energy released when 2 moles of methane (CH4) are burnt. The solution uses stoichiometry and the concept of energy in chemical reactions, demonstrating how to multiply the moles by the heat released per mole (890 kJ/mole). Suitable for Grade 10 chemistry students.

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