CarmelBeard CarmelBeard

04-06-2015
Chemistry

contestada

Which change is exothermic?
(1) freezing of water(2) melting of iron(3) vaporization of ethanol(4) sublimation of iodine

Respuesta :

lulu1991 lulu1991

25-06-2015

The answer is (1) freezing of water. The energy of different status is increase from solid to liquid to gas. So the change of liquid to solid is exothermic. The other three are endothermic.

Answer Link

Otras preguntas

help needed i dont understand

Florida has 8 less than the number of counties in Arizona.

just need the answer. in degrees thanks;) 1. QR = 36 ; PR = 45 ; PQ = 21, Sin _?. = 21 / 45 2. QR = 16 ; PR = 2 ; PQ = 8, tan _?_ = 8/16 3. QR = 15; PR = 28 ; P

What would you do with the force and mass to create a situation where the car has the highest acceleration possible?

What role does raising money play in the everyday lives of Washington lawmakers?

Johnny has 2 apples and Daniel has 5 apples. How many apples do they have combined?

What does the product of the two circled numbers represent?

Help Please I will give 20 points only Indonesian

How should we settle disputes arising in our community life.

i just want to know if this is a good painting..?