What is the delta H for the combustion of methane?

Substance Combustion Reaction Enthalpy of Combustion, ΔH∘c(kJmolat 25∘C)
methane CH4(g)+2O2(g)⟶CO2(g)+2H2O(l) −890.8
acetylene C2H2(g)+52O2(g)⟶2CO2(g)+H2O(l) −1301.1
ethanol C2H5OH(l)+3O2(g)⟶2CO2(g)+3H2O(l) −1366.8
methanol CH3OH(l)+32O2(g)⟶CO2(g)+2H2O(l) −726.1

How do you calculate the enthalpy of combustion of methane?

Thermodynamics. Calculate the enthalpy of combustion of methane, it is given that heat of formation of CO2(g), H2O(l) and CH4(g) are -393 5 kJ mol1, –285 . 9 kJ mol1 and –748 kJ mol1 respectively. Enthalpy of combustion of methane is -217.3 kJ mol1.

What is the value of ΔH for the combustion of one mole of methane?

The combustion of methane, CH4, releases 890.4 kJ/mol. That is, when one mole of methane is burned, 890.4 kJ are given off to the surroundings. This means that the products have 890.4 kJ less than the reactants.

What does it mean if Delta H is positive?

When enthalpy is positive and delta H is greater than zero, this means that a system absorbed heat. This is called an endothermic reaction. … For example, when water changes from liquid to gas, delta H is positive; the water gains heat. When water changes from liquid to solid, delta H is negative; the water loses heat.

What is the enthalpy of combustion per mole of c2 h2 G )?

The heat of combustion per mole for acetylene, C2H2(g), is -1299.5 kJ/mol.

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What energy is released during combustion?

Overall, combustion is an exothermic reaction given off or exiting , which means that energy is released. Usually, heat and light are released during a combustion reaction. During exothermic reactions (like combustion), bonds are broken, which allows the energy trapped in the bonds to be released and do work.

What is enthalpy of formation of methane?

Hence the enthalpy of formation of methane is −75kJ. Answer verified by Toppr.

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