0
Want this question answered?
Be notified when an answer is posted
Add your answer:
Earn +20 pts
If a susbtance has a high heat of vaporization what does this mean in terms of the quality of heat needed for the evaporation of this liquid?
It's not the quality of the heat, but the quantity of the heat. It means you need to put a large amount of (heat) energy into that substance to convert it from liquid to vapor at the same temperature. (Check out boiling water.)
Science what do you use for heating small amounts of liquid?
Generally you'd use a heat block.
The molar heat of fusion for water is 6.008 kJmol What quantity of heat energy is released when 253 g of liquid water freezes?
When the molar enthalpy of fusion for water is 6.008 kJ/mol, there is 84.4 kJ released when 253 grams of liquid water freezes. 84.4 kJ
How long does it take thick liquid to boil?
It depends on the liquid, water is 100 Celsius. --------------- Everything is a little confused here. Solids are not liquids. If you are asking about time, you would have numerous additional factors to consider. The substance The boiling point. The starting temperature Quantity of the substance Amount of heat being applied, and even the maximum amount of heat that your heat source is capable of applying. Perhaps also insulation. An electric arc might be able to essentially vaporize a small amount of metal almost instantly. Consider an ancient flash bulb, or what happens when you connect too much power to an automobile fuse. Likewise, it takes very little effort to make liquid nitrogen boil.
When a liquid freezes does it give off heat?
yes as long as there is movement in the atoms there is heat. When a liquid freezes heat is removed to the freeze point, but there is still heat in the liquid
What would you use to heat small amount of liquid?
A Bunsen Burner
What would temperature of a liquid at a temperature of degrees C and of specific gravity of 0.7 be after the addition of 13521600 Jules of energy?
The answer will depend on the quantity of the liquid and its specific heat.
When a given quantity of a liquid is heated the mass quantity will vary and how?
The volume will increase, since most liquids tend to expand when they are heated. The mass will NOT increase, for most practical purposes - since there is something called "conservation of mass". However, the energy added to the liquid is equivalent to a small amount of mass; this is insignificant for most practical purposes.
If a susbtance has a high heat of vaporization what does this mean in terms of the quality of heat needed for the evaporation of this liquid?
It's not the quality of the heat, but the quantity of the heat. It means you need to put a large amount of (heat) energy into that substance to convert it from liquid to vapor at the same temperature. (Check out boiling water.)
What is the heat of evaporation?
Heat of vaporisation is the amount of heat require to transform substance from liquid to gas state at constant temperature. Heat of vaporisation expressed in kJ/kg of substance.
How do you work out the quantity of heat?
by dividing the quantity of heat of a substance by the mass of that substance
How does the amount of heat required to change water from a solid to a liquid compare with the amount needed to change from a liquid to a gas?
Very simply, the amount of heat required to change state is exactly the same for solid to liquid (ice to water) and liquid to gas (water to steam) for a given substance, in this case water. The basic measurement of heat is the BTU (British Thermal Unit). 1 BTU is the quantity of heat required to raise 1 pound of water 1 degree Fahrenheit at atmospheric pressure. Keep in mind that there are two 'types' of heat to consider when contemplating the change of state of a substance: Sensible heat and latent heat. Clearly, sensible heat we can measure directly with a thermometer. Latent heat is a calculated quantity. When water undergoes the change of state from water to steam (liquid to gas) it does so through the gain of heat quantity. That heat gain that causes the change of state is latent heat, i.e; the actual heat gain is unmeasurable by thermometer since the temperature of that water is 212 deg f as it undergoes the change of state to steam, and that steam is also 212 deg f. Any increase in the temperature of the steam is said to 'superheat' the steam. As an example, steam fed boilers are nearly always supplied with 'superheated' steam at temperatures near 600 deg f. We see the addition of heat quantity as sensible heat during the rise of the waters temperature to 212 deg f (we are able to measure the rise in temperature), then we see the addition of heat quantity as latent heat during the change of state to gas from liquid (no change in the measurable temperature during the change of state), and again the addition of heat quantity as sensible heat in the process of 'superheating' the steam to any temperature above 212 deg f. If you can quantify the amount of water in pounds, you can quantify the amount of heat in BTU's.
What happen to liquid when it absorbs or released heat?
Liquid would get changed into gas form at this fixed temperature, called as Boiling point of the liquid. The heat thus given will be known as Latent Heat.
Is heat transfer a scalar quantity or vector quantity?
A vector
Would you add heat or take away heat to freeze a liquid?
Freezing is an exothermic process.
What do you use for heating small amounts of liquid in science?
Generally you'd use a heat block.
Science what do you use for heating small amounts of liquid?
Generally you'd use a heat block.
