Respuesta :
Answer: 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.
