Question

1. you decide to make strawberry banana popsicles. what change in state will need to occur?
2. explain in detail what happens to the particles before, during, and after sublimation.

Explanation:

Question 20

To make strawberry banana popsicles, the strawberry - banana mixture (which is initially in a liquid state, like a smoothie or puree) needs to be frozen. Freezing is the process of a substance changing from a liquid state to a solid state. The liquid mixture will lose heat energy, and the particles will slow down in their movement, eventually arranging themselves in a more ordered, solid - like structure to form the popsicle.

• Before Sublimation: The substance is in a solid state. In a solid, the particles (atoms, molecules, or ions) are closely packed together in a highly ordered arrangement. They vibrate in fixed positions around their equilibrium points. The intermolecular forces (or interparticle forces) are relatively strong, which keeps the particles in place and gives the solid a definite shape and volume.
• During Sublimation: Sublimation is the process where a solid changes directly into a gas without passing through the liquid state. For this to happen, the particles in the solid must absorb enough energy (usually in the form of heat). This energy overcomes the strong intermolecular forces holding the particles in the solid structure. As the particles absorb energy, they gain kinetic energy. They start to move more vigorously, and eventually, the intermolecular forces are no longer strong enough to keep them in the solid lattice. The particles break free from their fixed positions and start to move freely, just like in a gas.
• After Sublimation: The substance is in a gaseous state. In a gas, the particles are far apart from each other. They move randomly and freely in all directions at high speeds. The intermolecular forces between gas particles are very weak (compared to solids and liquids). The particles have a large amount of kinetic energy, and they fill the entire volume of the container they are in, taking on the shape of the container.

Answer:

The change in state that needs to occur is liquid to solid (freezing).

Question 21