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

how to Express each decimal as a fraction or a mixed number in a simplest form ? I need help with -0.14

What Was Jackson’s perspective on the McCulloch v. Maryland Supreme Court Case

What is two thirds of 120?

Suppose that 2 scientists use different measurement systems in their work. What problems might arise if they shared their data?

1/3(9x+27)-4=1/2(2x+54)

The most commonly spoken language in the Fertile Crescent around the time of Jesus was

If Olivia and Shawn have another child, which of the following genotypes is possible for the child? A. Mm only B. MM only C. MM or mm only D. MM, Mm, or mm

Factor the expression -10x^2-41x-21

Containment was a policy in which the U.S. tried to do what?

How many magnesium ions are present in 5.36 x 10-4 mol of magnesium iodide?