Why enthalpy of combustion is always negative ?

Combustion reactions release heat which tells us that the enthalpy changes the system,

ΔH, will always be negative.

This is because enthalpy is the total heat content of a system. Since heat is released for combustion reactions, the total heat content must decrease.

If it decreases, the final value would be less than the initial value—giving us a negative number for ΔH.

dishwashers don't have rights

explanation:

dishwashers are meant for one thing and one thing only: dishwashing. they belong in the kitchen making sandwiches and cleaning up for the man of their household. if your dishwasher starts acting up just slap it and wait a minute.

in 1783 cavendish was working with his hydrogen gas and found that when he burned it and condensed the vapor it was water. this was very significant since it disproved the greek theory of elements completely since water was not a simple substance but the product of two gases. it was lavoisier who hearing of the experiment gave cavendish's gas the name hydrogen ("water-producer") and added that hydrogen burned by combining with oxygen and that water was a hydrogen-oxygen combination.

explanation: