Enthalpy of a combustion reaction?

[Riya Sood 4G]

Is Delta H positive or negative for a combustion reaction?

[Zoe Gleason 4F]

Since combustion reactions release a lot of heat, their ΔH will be negative.

[Lara Kristine Bacasen 1L]

Combustion is an exothermic reaction and gives off heat so the delta H should be negative.

[Nicholas_Gladkov_2J]

Is Delta H positive or negative for a combustion reaction?

If delta H is positive, this means that heat was absorbed in the chemical reaction (endothermic), and thus the surroundings loose heat, or become cold.
The opposite is true for negative delta H. This means that heat was released in the chemical reaction (exothermic), and thus the surroundings gain heat, or become hot.
Think of combustion as burning, so if you think about it, it is exothermic.

[Madeline Phan 1E]

Combustion is an exothermic reaction, so delta H should be negative.

[Nuoya Jiang]

It is usually negative because heat is released during the combustion process.

[305385703]

delta H is negative. Heat is being released as the products are entering a more stable state as they form reactants.

[Max Madrzyk Dis 4G]

Usually in a combustion reaction heat is released meaning that delta H will be negative.