In which of the following phase transitions is energy released?
liquid to solid
solid to gas
liquid to gas
solid to liquid
please help
In phase transitions, energy can be either released or absorbed. In the given options, the phase transition in which energy is released is:
solid to liquid
To determine which of the given phase transitions releases energy, you need to consider the concepts of energy absorption or release during phase changes.
During a phase transition, energy is either absorbed (endothermic) or released (exothermic).
In an endothermic phase transition, energy is absorbed from the surroundings, resulting in a decrease in temperature. Conversely, in an exothermic phase transition, energy is released into the surroundings, leading to an increase in temperature.
Now, let's analyze each of the phase transitions mentioned:
1. Liquid to solid: When a liquid turns into a solid, energy is released, causing a decrease in temperature. This phase transition is exothermic.
2. Solid to gas: When a solid transforms into a gas, energy is absorbed from the surroundings. This phase transition is endothermic.
3. Liquid to gas: When a liquid changes into a gas, energy is absorbed from the surroundings. This phase transition is endothermic.
4. Solid to liquid: When a solid melts into a liquid, energy is absorbed, causing an increase in temperature. This phase transition is endothermic.
Therefore, the phase transition where energy is released (exothermic) is when a liquid turns into a solid.
I do not understand why you are having trouble with this. It is the same old lava problem.
water to ice --- refrigerate=heat out
ice to steam ---- heat in
water to steam ---- heat in
ice to water --- heat in
heat is energy