Calculate the amount of energy when water at 72 degrees c freezes completely at 0 degrees c

The amount of energy needed when water at 72 degrees c freezes completely at 0 degrees c is Joules

Explanation:

where

= Final T - Initial T

=30125J

Q is the heat energy in Joules  

c is the specific heat capacity (for water 1.0  cal/(g℃))  or 4.184  J/(g℃)

m is the mass of water

mass of water is assumed as 100 g (since not mentioned)

 is the heat energy required for the phase change

=mass × heat of fusion

Total heat =

Total Heat = 30123J + 33600J

= 63725 J

= Joules is the answer

hloride, what is the mass of calcium in

explanation:

atomic mass = 39

number of neutrons = 20

number of protons= 19

electronic configuration = 1s2 2s2 2p6 3s2 3p6 4s1

the number of electron in first shell = 2

number of electrons in n=3 shell = 8