Steam is formed and separated from water once it reaches boiling point(100 deg.C) In other words the steam is formed (gaseous form) from liquid state due to phase change.
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When you add heat to liquid water it gets warm. If it gets warm enough it will boil and evaporate.
When steam condenses to water, it releases the latent heat it absorbed during the phase change from water to steam. This heat energy is transferred to the surroundings, leading to a temperature decrease in the steam as it turns into water. This energy release helps to warm the environment around the condensed water.
Not much, it gets warm as everything else within the heater's range.
Steam is the gaseous form of water above its boiling point. When you see 'steam', that is not really steam, it's warm-water droplets in the air.
the warm water floats
The dog gets warm. :)
Condensation
Nothing really happens to the water that sits over night. It just gets warm. But if you left water out for let's say a week it would have a sour smell and would be bad to drink.
How high are you
Lightest warm water is steam, while the lightest cold water is ice.
mercury explodes