What happens to the mass and volume of a matter during a phase change?

Answer 1

there are three

Answer 2

The mass of a substance in one phase is the same as in another phase because the molecules in the substance just get more or less excited, because you are adding or taking away energy. When you are adding or taking away heat, you are actually adding and taking away energy.

Answer 3

Heat is absorbed but there is no rise in temperature.

Furthermore, 'Phase change depends on the temperature and the amount of pressure exerted on it, also usually involving a transfer of energy.'

Thusly, phase changes depend mostly on the heat energy (absorbed or released) and the amount of pressure exerted. in a phase change, a substance does one of these things to turn into a different state of matter: melt, freeze, evaporate, boil, condense, sublimate, or desublimate (deposition.)

Answer 4

During a phase change. the mass of the substance does not change due to the conservation of mass.

In a closed system, the mass does not change no matter what phase change or chemical reaction takes place.

Answer 5

mass stays the same, however volume changes. If it is going from solid to liquid or liquid to gas, the volume increases. If it is going the opposite direction, then volume decreases. An exception is water, which increases in volume as it goes from liquid to solid.

Answer 6

I'm not entirely clear on what you mean by this, but I'll take a stab at it.

If you add heat to a material when it's not at a phase transition point ... to ice at -10 degrees Celsius, for example ... the heat "goes into" raising the temperature of the material. The heat capacity of ice is about 2 J/gK, so if you have a kilogram of ice and add 1000 J of heat energy to it, the temperature will go up by roughly half a degree Celsius.

However, when you reach 0 degrees Celsius, something interesting happens: the temperature stops going up. All the heat added goes into melting the ice rather than raising the temperature. The enthalpy of fusion of water is a little under 500 J/g, so that kilogram of ice will absorb 500 kJ of energy while remaining at the same temperature.

After the ice is melted, the temperature will go up again as more heat is added, at a rate of around 4 J/gK.

Answer 7

During a phase change, the mass of the matter remains constant, as no particles are added or removed. However, the volume of the matter may change depending on the properties of the new phase. For example, during the melting of ice into water, the volume increases while the mass remains the same.

Answer 8

The state of matter?

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