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it heats the air above it.
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∙ 11y ago
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Why Water is poured to extinguish burning wood?
The water takes heat in the form of latent heat at its boiling point to convert into vapour. this puts the fire down.
What happens when water evapourates?
When water evaporates cooling takes place because vapours starts absorbing the heat from the atmosphere.
What has the greatest specific heat - granite rock - sand or water?
Water has the highest specific heat, sand and granite could be very similar but there are very many types of sand so no definite relationship can be given without more information.
Why is water often used to cooling systems?
This is because specific heat of Water is very less, so it is very easy to cool down water and it easily takes up heat from other sources to cool them down.
During a change of state why doesnt the temperature of the substance change?
The temperature of a substance depends on the amount of heat energy in it. So when you heat up water its temperature rises. However, when a substance changes state - when water boils, for instance - liquid water uses heat to become a gas. The amount of heat it takes to convert one gram of water (at 100 deg C) to gaseous water (at 100 deg c) is 539 cal. That is, taking a gram of water from 99 deg C to 100 deg C consumes 1 calorie, but taking that liquid water to gaseous water takes another 539 calories. The heat overcomes the intermolecular attractive force - the cohesion of the liquid water molecules. But when you add the 540th calorie the gaseous water's temperature goes up to 101 deg C. That is called the heat of vaporization. Similarly, the heat of fusion is the amount of heat energy it takes to liquefy ice - and the temperature stays at 0 deg C when you add nearly 80 calories to turn ice into liquid water. In other words, melting ice takes as much energy as it would take to raise the temperature of liquid water from 0 deg C to 79.7 deg C.
Does it take more heat to heat water or to boil water?
It takes more heat to boil water than to simply heat water. Unless the water is already at its boiling point.
What is the effect of the time it takes to boil 16oz of drinking water by varying the temperature of the heat source?
If you increase the temperature of the heat source, you decrease the time it takes to boil the water.
Does heat affect the freezing water?
Yes - it takes longer to freeze water if you add heat - or melts it, if already frozen
Does air or water loose heat faster?
air. water takes longer to warm, but it also takes longer to cool.
Why does water have a greater specific heat over then sand?
water has a greater specific heat than sand becasue it takes longer to heat up than sand does
Does the volume of water affect the time it takes to heat up?
yes !!
Why does lands heat faster than water?
Land has compact molecules so only conduction takes place and it is an insulator of heat so the heat remains on the surface whereas water has loosely packed molecule so heat is transferred by convection ths it takes a longer time to heat up.
Water has a temp of 4.184 and copper has a temp of 0.387. Does it takes more heat to raise the temp of the copper molecule?
These are not temperature numbers but specific heat numbers. They mean that it takes 4.184 Joules and 0.387 Joules respectively to raise water and copper of one gram by one degree celsius. So, as you can see, it takes a lot more heat to raise the temperature of water than it does of copper. Water has a very high specific heat.
Why the heat capacity of water more than ice?
Water can hold more heat than ice before it changes states. For example, when you add heat to ice, it changes to water almost immediately. When you add heat to water it takes more to turn it into steam.
How much heat does it take to heat 1 liter of water from 20 to 80 degrees?
The calorific value of water is 80cal/degree. so it takes 60*80=2400cal of heat.
If it takes 300 calories of heat to change the temperature of water from 10ºC to 70ºC. What is the mass of the water?
cd
What type of material retains heat the best?
insulators although they take a long time to heat up, it takes a longer time to cool down. that's why if you heat water in a metallic container it takes more time for the water to cool down than the coontainer.
