What entropy change is associated with the reversible phase change from 1.0kg of ice to water at 0 ° C?

1200 J/K  

Explanation:

The formula for the entropy associated with a reversible phase change is

For a reversible phase change like melting,

Data:

Mass of ice = 1.0 kg

T = 0 °C

Calculations

1. Convert the mass of ice to grams

2. Convert the temperature to kelvins

T = (0 + 273.15) K = 273.15 K

3. Calculate the heat needed to melt the ice

4. Calculate the entropy change

explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

            and  

since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be and .  

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.