Suppose ice water is in a closed container at a constant 20°c. what reversible reactions occur in the container? water formation and decomposition to hydrogen and oxygen sublimation and deposition evaporation and condensation melting and freezing

The correct answer is melting and freezing.

Explanation: We are given ice water which is placed in a closed container at 20°C. there are 3 states of matter: Solid, liquid and gas.

There are in total 6 reversible reactions happening between these three states of matter:

1. Sublimation and deposition: These 2 reversible reactions happen between solid and gas.

2. Evaporation and Condensation: These 2 reversible reactions happen between liquid and gas.

3. Melting and Freezing: These 2 reversible reactions happen between liquid and solid.

Melting is defined as a process in which solid is converted into its liquid form.

Freezing is defined as a process in which liquid is converted into its solid form.

Ice is present in solid form and water is present in liquid form. Hence, the reversible reactions that occur in a container are melting and freezing.

speed of light in vacuum is 300,000 km/s

speed of light in other mediums is given by the expression v = c/n, where c is the speed of light in vacuum and n is the refractive index of medium.

for the first medium v = 200,000 km/s

  so, refractive index of medium = 300000/200000 = 1.5

    1.5 refractive index is usually for glass. so first medium is glass.

for the second medium v = 250,00 km/s

so, refractive index of medium = 300000/250000 = 1.2

    1.2 refractive index is usually for water. so second medium is water.

for the third medium v = 0 km/s

so, refractive index of medium = 300000/0 = ∞

    ∞ refractive index is usually for opaque mediums. so third medium is opaque medium.