Chemistry, 13.10.2020 06:01 mallyosburn

Why is melting ice cream a physical?

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Answer from: ooEVAoo

Melting ice cream is a physical change because it is a phase change, the water in the ice cream gains thermal energy and the inter-molecular forces are overcome and the molecules move further apart forming a liquid. It is not a chemical change because no chemical reactions occurred.

Answer from: Riplilpeep

Ice cream melting is a physical and reversible change because it is a solid and the sun's heat is making it melt into a liquid. It is reversible because it is able to change back its state into a solid with the heat taken away. Reversible changes is a change in a substance that can be reversed.

Frozen yogurt dissolving is a physical and reversible change since it is a strong and the sun's warmth is making it soften into a fluid. It is reversible since it can change back its state into a strong with the warmth removed. Reversible changes is an adjustment in a substance that can be switched.

Answer from: Quest

the balanced equation for reaction of ca metal with o2 to produce cao is as below

2 ca+ o2→ 2 cao2

explanation

the reaction is balanced since the number of atoms in reactant side is equal to number of atoms in product side. for example they are 2 atom of ca in reactant side and 2 atoms of ca in the product side.

the process is a meet the requirement of redox reaction because : calcium is oxidized from oxidation state 0 to 2+ while oxygen is reduced from oxidation state 0 to 2-

Answer from: Quest

Ch4 is nonpolar and insoluble in water. since all of the hydrogen atoms are evenly spread around the carbon atom even through the c h bond is polar all the poles cancel each other out.

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