Enthalpy question 4?

Question

Identify each of the following as endo thermic and exothermic. Explain each.

a) steam condensing

b) ice melting

c) two atoms combine to form a molecule 2Cl(g)-->Cl2

d) an electron is removed from an atom: Na(g) --> Na(g) + e-

e)a molecule is dissociated to produce two ions: NaF(g)--> Na(g) + F-

I WILL RATE YOU 10 POINTS

Answer 1

exo

endo

exo

endo

endo

Answer 2

This is easy.

a) exdothermic

b)endothermic

c)exothermic

d)exothermic

e)exothermic

Just know that endothermic is from solid to liquid to gas

exothermic is gas to liquid to solid

and when it's an endothermic reaction the energy should be on the left hand side of the equation and right hand side for exothermic

Hope this is good enough!

Answer 3

a) liquid water to water vapour, energy needed to change its state so endo

b)endo

c)bonds formed between Cl atoms so exo

d)first ionization enrgy is endo

e)bonds breaking so endothermic