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From Thermo-Pad .com FAQ's

What are the white crystals that form in the liquid pad?

If the Thermo-Pad has been stored in its crystallized state for an extended period of time, a small amount of water can evaporate from the pad and cause the solution to become more concentrated. This higher concentration is indicated by "snowflake like" crystals in the liquid pad. The pad will still operate but at a slightly higher temperature. This water loss can be substantially reduced by storing the pad in its liquid state and may be reversed by extending the boiling times and by leaving the pad in water to cool.

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Why don't liquids evaporate when sealed?

When a liquid is sealed in a container, the vapor pressure of the liquid increases inside the container until it reaches equilibrium with the liquid. At this point, the rate of condensation of vapor back into the liquid is equal to the rate of evaporation, resulting in no net change in the liquid level. The container essentially traps the vapor, preventing further evaporation.


How do you separate nitrogen gas from a mixture of nitrogen gas and liquid nitrogen?

You can separate nitrogen gas from liquid nitrogen by allowing the liquid nitrogen to evaporate at room temperature or by heating it to increase the rate of evaporation. The nitrogen gas will separate from the liquid nitrogen as it evaporates, leaving behind the liquid nitrogen.


When you freeze it it a solid when it is a liquid you can drink it when it is a gas you wont be able to see it its five letters what is it?

When this substance is a solid, it is called ice. When the substance is a liquid, you can drink it to become refreshed. When the substance is turned into gas, it is invisible. The substance is water.


What temperature at which a substance changes from solid to liquid is called its?

It is the boiling point of the substance.


Does temperature affect the rate at which alka-seltzer dissolves?

it doesn't really depend on the type of solultion its the temperature that affects it. the hotter the solution the faster the alka selzter will disolve.the opposite of this is if the the solution is cold.this is not really complitcated and im only in the 7th grade