When something goes from it's liquid form to solid, it is a heat loss. A simple example is making an ice-pop in a freezer. The liquid fruit-juice/water mixture has to lose heat to the freezer (and the other contents) in order to solidify. Subsequently it has to gain heat from your mouth to melt when you eat it (which is why it feels cold).
No. When a gas condenses to a liquid it will release (or loose) a form of heat called "latent heat". This heat (energy) is required to break the intermolecular bonds and will not raise the temperature of the substance, but will retain the energy as heat.
More simply, steam at 100 degrees C is "hotter" (contains more energy) than water at 100 degrees C.
Looking at it the other way around - from liquid to gas makes everything clear: When you boil water, you put in 1 calorie of heat energy and 1 ml of water goes up by 1 degree C. This goes on, with your test tube constantly having the temperature change for the better. Then we reach 100 degrees (water boiling point). Now we put in more heat, but the temperature stays put. Instead, the water turns to vapor.
Having said this, perhaps it would help to clarify what "gaining heat" is. There are two ways of looking at the question: Intuitively, the way we perceive it, and scientifically, which is probably what this question is about.
First: Intuitively - If the liquid "gained heat" - either it's temperature would be higher (as shown by a thermometer inserted in the liquid), or the surrounding temperature would go down (in order to give energy to the liquid, so now the surroundings lost some energy which the new liquid gained). But neither happen. Rather, JUST THE OPPOSITE happens:
The liquid "LOOSES HEAT" - but it's temperature does not go down. The surrounding temperature goes UP! In order to explain this intuitively, I like to think of a sponge. Liquid is the sponge all squished, while the gas is a free sponge, ready to absorb (heat).
When the sponge is squished, the heat leaves it.
Now to the scientific perception: In science you don't look at things as "pushing" or "causing". You look at the numbers before and after, and say: So and so is what "happened". So your not looking at the "squishing" but rather just checking things at the different stages. When it was gas: Its temperature was A, and the surroundings were B. Now the liquid's temperature is still the same, but the gas around it heated up.
You gain heat.
For what?It requires a heat gain for the water,but a heat loss for whatever the water is in contact with.
Because it has good insulation so it prevents boss loss and gain of heat from the surrounding ---- Well that's true, but more interestingly, it has a glass chamber inside which is smaller than the outer casing. The air between the glass chamber and the outer casing has had almost all of the air removed, and is therefore a vacuum. This makes the heat unable to escape between the inner chamber and the outer casing, keeping the liquid hot. It also stops heat from outside being able to get into the liquid stored in the glass chamber, therefore keeping it cold. Most of the heat from the flask is lost from the lid, since the liquid has to come out of somewhere.
heat energy
Installing fiberglass batting will completely eliminate heat loss.
The rate of heat loss from the hot cup decreased during the experiment.
1. a liquid changes to a solid. This process is called freezing, and involves the loss of heat.
freezing -to pass from the liquid to solid state by loss of heat
Change of the phase of electrical current in a circuit or of an el magnetic wave propagating in space means change of the rate of oscillations per second of the source (generator, in particular) of the oscillations. In FM (frequency modulated )radio wave transmission sounds (music, speach) are made to modulate frequency of the generator - its rate of oscillations is changing according to the changes in phase of the vibrations of sound waves in air.
heat loss
It doesn't. Evaporation is the change of state from a liquid to a gas, caused by added surface heat. You're thinking of freezing, caused by loss of heat.
A temperature change requires as gain or loss of heat energy.
Heat gain, otherwise, a heat loss would be like turning off the heat beneath a saucepan on the stove.
Such a temperature is known as Freezing point of the liquid, during the freezing process the system losses the energy.
For what?It requires a heat gain for the water,but a heat loss for whatever the water is in contact with.
NO Heat Loss , No Heat gain
These are exact opposities - heat gain is an increase in energy that results in an increased temperature of the material. Heat loss is a loss in energy that results in a decreased temperature of the material.
a loss in energy cause the change from liquid to solid like-wise a rise in energy causes a change from solid to liquid.