use a thermetor
There is a link between the mass of water heated and how much that water rises in temperature. It's called the "heat capacity" of water. It takes 1 joule of energy to raise the temperature of 1 gram of water by 1 degree celcius (or kelvin). So knowing this you can work out how much hotter a specific amount of water would become if you applied a known amount of energy to it.
it doesn't. Through the law of conservation of mass what goes in must come out.
The density of water changes at different temperatures. As temperature goes up, density goes down.
no
There's no reason for the mass of anything to depend on its temperature.
As temperature increases, the density of water decreases. This is because water expands when heated, causing the same mass of water to occupy a larger volume. At 0°C, water is at its maximum density, but as the temperature rises above this point, its density begins to decline. Thus, a rise in temperature from 0°C will result in a decrease in the density of water.
As a hydrated compound is heated, the water molecules contained within it will evaporate, leading to a decrease in mass. This process is known as dehydration.
The mass of TiO2 does not increase as it is heated. As TiO2 is heated, the titanium becomes more oxidised, and increases in oxidation state, and so oxygen is added to the molecule, making TiO3. As oxygen is added to TiO2, the mass you measure increases, but it does not stay as TiO2.
Mass
Solid copper appears to gain mass when heated in air, because the copper reacts with oxygen in the air to form copper oxide. However, the actual mass of the copper does not increase; the mass of the solid increases by a value equal to the mass of oxygen removed from the air.
It does not decrease in mass, only weight, the mass is still all there, but as when it has been heated smoke is given off from the element, and goes into the atmosphere. It may not sound like the mass is all there with the heated element, but if the smoke were conserved during the experiment the weight would be the same as before the experiment.
To find the mass of heated air, you need to know its volume, temperature, and pressure. Use the ideal gas law equation: PV = nRT, where P is pressure, V is volume, n is the number of moles of air, R is the ideal gas constant, and T is the temperature in Kelvin. By rearranging this equation and solving for mass (m = n * molar mass), you can calculate the mass of the heated air.