Page 1 of 1

Enthalpy of Halogen Breakdown

Posted: Sat Jan 19, 2019 6:13 pm
by John_Richey_4A
Is delta H positive or negative in the breakdown of halogens like F2 into 2F?

Re: Enthalpy of Halogen Breakdown

Posted: Sat Jan 19, 2019 6:31 pm
by Alyssa Wilson 2A
Delta H is the change in enthalpy and if delta H is greater than zero, this means that a system absorbed heat and is known as an endothermic reaction. When delta H is less than zero, this means that a system released heat and the change in enthalpy had a much larger initial enthalpy value than the final one. This is called an exothermic reaction. In the breakdown of halogens, delta H would remain positive because of the large distance between the bonding pairs of the nuclei in the halogens. Each halogen will feel a net pull of +7 from each end of the bond.