Carbonation does not alter temperature. In fact, carbonated soft drinks are normally refrigerated. They taste much better when they are cold.
No, not when this stove is under normal pressure (1 Bar)
No! The Hottest Water On Earth is 407 celsius and Venus Is Hotter Than That! You Can't Get Water Hotter Than Venus!
Generally speaking, carbonated water is just as hydrating as non-carbonated water. Most carbonated water contains no additives (other than the carbon dioxide). However, some carbonated water contains additives. One of the more common additives to carbonated water is sodium chloride (table salt). Depending upon the amount of sodium in the carbonated water, and your body's sodium levels, the carbonated water could be more or less hydrating than the non-carbonated variety. The addition of the carbon dioxide has no effect on the hydrating power of the water.
No. They both have the same amount of carbonated water
Density of carbonated water is 1%- 4% greater than unsaturated water.
yes
Yes. Water by definition is just water and nothing else. A carbonated beverage is water that is carbonated along with flavoring syrups, dyes, citric acids, sugar and preservatives.
In general, foam is a better insulator than metal, and so foam would be expected to keep water hotter longer under most normal circumstances.
It is not any healthier than table water.
hotter than cold water
It depends on the carbonated water. Some have added salt, which would make them a slightly less healthier option. However there are quite a few sparkling and carbonated waters that don't have any added salt and would put them at them same level, health-wise, to regular water.
It is not always hotter, but most of the time it is because the outside temperature is lower than 98.6 which is the normal core temperature of a healthy human being.