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

What is the simplest form of √1,764?

the theme of William Wordsworth's "Tintern Abbey"

An experienced bricklayer can construct a small wall in 4 hours. An apprentice can complete the job in 12 hours. Find how long it takes if they work together. I

Vieques es un municipio de ____. la república dominicana puerto rico entre los atractivos de la isla se encuentra ____. un pico altísimo una bahía bioluminiscen

what is the value of the expression |-5x+12| when x=5

The hypotenuse length is

a rectangular prism with length f, width w, and height h has a volume of lwh. what is the volume of a prims which has a base of of 5m by 3m and a height of 4m?

Evaluate C (9, 3). 504 84 60,480 5,040

A classmate says that line AB is parallel to line DC according to the diagram. Explain the classmates error. (Look at picture question 23)

Calculate the area of the trapezoid if a = 17.3, b= 13.5, c= 7.8 and h= 12.6