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Does the heat per pound to change the temperature of water stay the same regardless if the water is in a solid liquid or vapor state?
Wiki User
∙ 12y ago
No. The quantity of energy required to raise the temperature of water is different depending on the phase of water. This is especially true at or near a phase transition as thermal energy is absorbed during a phase transistion thus altering the amount of energy required to raise the temperature of said water.
Wiki User
∙ 12y ago
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What kind of changes are melting and boiling?
Melting is a phase change where solid becomes a liquid. The latent heat of fusion must be supplied to produce phase change from solid to liquid. About 144 Btu must be supplied to change 1.000 pound of ice at 32 degrees F to 1.000 pound of liquid water at 32 degrees F. Boiling is a phase change where a liquid becomes a vapor. The latent heat of vaporization must be supplied to change a boiling liquid to a vapor. For water boiling at 14.7 psia ,970.3 Btu of heat must be supplied to change 1.000 pound of boiling liquid water to vapor.
What must happen for gaseous water to become liquid water?
It has to give up quite a lot of heat. A pound of steam carries 940 btu's of heat that has to be transferred out to end up with one pound of water at the same temperature. It only takes 180 btu's to raise water from 32 degrees Fahrenheit to 212 degrees.
Water absorbs heat from a fire at the rate of Btu per pound of water?
To raise the temperature of 1 pound of water 1 degree F requires one BTU. If one pound of water at 62 degreesF is raised to 212 degreesF liquid, 150 BTU's would be required. When one pound of water at 212 degreesF is converted to steam, an additional 970 BTU's are absorbed. The total number of BTU's absorbed in converting one pound of water at 62degreesF to steam is 1,120 BTU's. Water weighs 8.33 pounds per gallon One gallon of water, when converted to steam, will absorb 9,330 BTU's (8.33 times 1,120)
How much does a pound of potassium weigh?
Well, at least he didn't ask whether a pound of lead or a pound of feathers is heavier.AnswerUm, this is a joke, right? A pound of anything, from feathers to stones, weighs a pound. In case it's a typo, and you meant to ask another question, a pint (two cups) of water weighs just under a pound, and a gallon of water weights about 8.34 pounds.AnswerSorry, but a pound is not always a pound. A pound of gold or silver weighs less then a pound of water or a pound of dead flies for that matter, but a ounce of gold or silver weighs more then a ounce of water or a ounce of dead flies!!Real Answer:- Actually that's completely wrong, don't listen to those guys. A pound is a pound, no matter what you are weighing. A pound is the gravitational pull on an object, and the more mass, the more that something weighs. When using a scale, a pound of gold is the same as a pound of water, there is just less gold than water present because gold has a much higher density (and thus when placed in water, it sinks)I assume that you want to know how many oz. of water weigh a pound? It is approximately 16.9 oz, although that varies as temperature and pressure affect the weight. If the temperature goes up, you can drink more water because water expands as temperature raises. If water is near freezing, you should drink slightly less than 16.9 oz. as the weight of water, measuring the same area, will go up.Water is a unique substance in that when it freezes, the density actually goes down and it floats. Thus, a large amount of ice would equal a smaller amount of liquid water.As I have wrestled my whole life up, even now in college, I have did a lot of work determining how much I can eat and drink every night and still maintain my weight. If you buy bottled water, you will be drinking a pound of water no matter the temperature because the bottles are filled with 16.9 oz of water at 72 degrees Fahrenheit when made, which is extremely close to one pound of liquid.ANS:Arrgh, you're all full of baloney. 'Pound' is a MASS unit. The 'Pound-force' is a WEIGHT unit. One pound of mass weighs one pound-force at sea level on earth. You could also call the pound-force a poundal. A poundal = 1 pound-mass x 1 ft/sec2 which at the surface of the earth, the acceleration on a 1 pound-mass object is 32 ft/s2. Let's use Newtons and avoid the argument. It weighs 1 lb, or 0.45 kg.
Convert 7.76 pounds to oz?
124.16 oz. One pound equals to 16 ounces and one ounce equals 0.06 of a pound. Also this relates only to solid (weight) ounces. There are two different kinds of ounces, ounces of weight/mass and ounces of volume (fluid). This can change when you are using the ounces to measure a non-liquid such as flour or sugar since the weight of dry items is not the same as their volume. An ounce of volume is called a "fluid ounce."
Does 1 pound of liquid equal 1 pound of solid?
The pound is a unit of weight, so anything that weighs one pound, regardless of whether it is a solid, a liquid, or anything else, has the same weight.
How many ounces are in a liquid pound?
It would vary depending on the liquid you are measuring. Water for example, 16.9 oz of water weighs one pound give or take a little for temperature.
What kind of changes are melting and boiling?
Melting is a phase change where solid becomes a liquid. The latent heat of fusion must be supplied to produce phase change from solid to liquid. About 144 Btu must be supplied to change 1.000 pound of ice at 32 degrees F to 1.000 pound of liquid water at 32 degrees F. Boiling is a phase change where a liquid becomes a vapor. The latent heat of vaporization must be supplied to change a boiling liquid to a vapor. For water boiling at 14.7 psia ,970.3 Btu of heat must be supplied to change 1.000 pound of boiling liquid water to vapor.
What weighs more a pound of solid or a pound of liquid?
they both weigh one pound
How many liquid ounces in a pound of burger?
1 pound of anything = 15.337782696563 ounce [US, liquid] 1 pound of anything = 16 ounce [weight]
How does the temperature of a substance change as it gains or loses heat?
A substance (in this case water) that gains or loses 'sensible' heat will change it's temperature at the rate of 1 deg F per pound of that substance per 1 btu loss or gain.That is to say that 1 pound of water will change 1 deg f as it loses or gains 1 btu of heat energy. That heat required to lose or gain 1 deg f is referred to as sensible heat, whether lost or gained, since it does change the temperature of the substance.However, that substance must gain or lose latent heat during a change of state; as in water changing from liquid to gas (steam). Latent heat affects the substance during it's change of state, and does not change the temperature of the substance during that change of state.Each substance has a specific heat, and so each substance has a different value of btu's required to make a change in their state or temperature.
What is the latent heat of ice?
A BTU is defined as the amount of heat required to raise the temperature of one pound of liquid water by one degree Fahrenheit. Melting a pound of ice at 32 °F requires 143 BTU. As is the case with the calorie, several different definitions of the BTU exist, which are based on different water temperatures and therefore vary by up to 0.5%:
What is the weight of water vs liquid chocolate?
a pound of water will weigh the same as a pound of chocolate
How many TB in 1 pound?
Tablespoon and Pound ere two different measurements(liquid and weight)
How many btu's are required to change 1 pound of water to 1 pound of ice?
Depends on the temperature of the water. If it is 32 degree water and you want 32 degree ice then you need a -144 BTU loss to change state from liquid to solid. It takes 1 BTU to raise the temperature of 1 pound of water 1 degree (F). If the water is 82 degrees then you would need a -50 BTU loss (+) 144 BTU to change state. TOTAL WEIGHT OF WATER (X) 1 BTU (X) Degrees desired of change. If it is ICE to WATER then it is the TEMP of ICE (X) .5 BTU (X) NUMBER OF DEGREES INCREASED = TOTAL BTU needs. If you change state in the process you have to add 144 BTU for 32 degree ICE to 32 degree WATER and 970 BTU for 212 degree WATER to 212 degree STEAM but only when you change state.
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.
How many ounces in a lb of liquid?
There are 16 ounces in a pound. -
