two glasses of water, 1 is 10º and the other is 90º, each is heated 10º more, will they take the same time?
341576
Besides the loss of heat due to the difference with room temperature, we can also check how water specific heat behaves with temperature. \nThe specific heat is the amount of heat required to change a unit mass of a substance by one degree in temperature. This specific heat increases with temperature, so this indicates us that water at a higher temperature needs a bit more energy to rise 1º than water at lower temperature.\n\nSo the answer is yes, it will take more time to rise from 90º to 100º because of two reasons:\n1- There is more loss of heat in the water at 90º than water at 10º.\n2- Specific heat is higher in water at 90º than water at 10º.
699816
the first thing you do is figure out how much heat it will take to melt the ice, this is done by multiplying the quantity of ice by the heat of fusion\n\n10g x 335 J/g = 3350J\n\nnow figure out how much the water cools off to give the ice that 3350J that it needs to melt, this is done by multiplying the amount of water by the specific heat and then dividing this into the energy transferred\n\n100g x 4.18J/gC = 418 J/C\n\n3350J / 418 J/C = 8 degrees C\n80-8=72C\n\nso now you have 100g water at 72C and 10g water at 0C, so you can figure out what this mixture will equilibrate to\n\n100 x 72 =7200\n10 x 0 = 0\n7200 / 110 = 65.4C will be the final temp of the mixture\n\nso the answer is D
765294
First the specific heat of water is not needed because both items mixed are water and would have the same specific heat so just use the weight.\n\nso you have 60 * 80 + 40 * 25 = 100 * x    where x is the new temperature in degrees C\n\nIf the items being mixed were different then use the specific heat of each item to calculate the number of joules in each item which will give the total number of joules in the combined item.
704288
Depends on the liquid, generally it is transfered from the bottom of the glass into the bottom of the liquid, but some of the heat will transfer up the tube as well.  Best bet any witch way is to angle it a little, and keep it pointed away from you and anyone else, agitate the liquid to help keep the heating even either by rocking it by hand or through the use of a spin vane.
763890
You asked this question twice, and I posted a detailed solution in answer to your other question.  I know your teacher's answer is 49 degrees, but if you go to the nearest tenth of a degree, 48.9 is a better answer.
1117920
It will be water at 100 degrees that will stay that temperature longer b/c of the increased volume.  The only way to increase the temp is to increase the energy (temperature) while keeping the same mass (like putting flame under the container of water).  Since you are increasing mass AND energy, it balances out.
677623
False\n\nWhen steam is cooled to water, both can be 100 degrees C, but steam must give off energy to become a liquid.  The opposite is easier to understand.  When you are boiling water, the steam that escapes will be 100 degrees C, but will have much more energy than the 100 degree water.\n\nIn both of these cases, the energy put into or taken out of the water is used to change its phase, without changing its temperature.
144832
Oops! Wrong answer.\n\nWhat I should have done first is check the density of both liquids before answering.\n\nWhole milk has a density of 1030 km/m3,\nwhile water at 20 degrees C is 998.21 km/m3.\n\nIf they have the same volume, than whole milk is a little heavier than water. Which isn't surprising, since milk is about 87% water.
202462
Four times . Air to glass. Glass to water. Water to glass. Glass to air.
714524
Well,  Hot & Cold are not only subjective (What's Hot for he is cold for me) and relative.  Better to think of temperature.\n\nTemperature is the measure of average kinetic energy.  The hotter, the more energy and vice versa.  \n\nAlso, as temperature is an average, some of the "hot" water may be cold.  In fact, there could be a several molecules that are frozen - we'd never know - but the average temperature is "hot."\n\nWhen you mix them heat is transfered from the high average kinetic energy water, "Hot," to the low average kinetic energy water, "Cold."  The "Cold" water absorbs the heat in the transfer and the results is as follows...\n\nThe "Hot" water is cooled, and the "Cold" water is warmed.  The results is 24 oz's of water that has an average kinetic energy, or temperature, higher than that of the "Cold" water, and lower than that of the "Hot."
293722
Let's make some assumptions:\n1. The cups are the same size, shape, etc\n2. The amount of hot tea is equal.\n3. Both cups are in the same room at the same temperature conditions\n\nThe laws of thermodynamics state that temperatures will seek equilibrium at a rate proportional to the difference between those temperatures.\n\nSo, by adding milk to one cup, you are slightly lowering the temperature of the tea. So, the milk tea will cool at a slower rate than the other tea because the difference in room temperature and the temperature of the milk tea is less than that of the other tea. \n\nFinal answer: cup of tea
635522
It depends on the liquid AND the pressure. 100C is for water at atmospheric pressure.
868477
water freezes at 32 degrees Fahrenheit, and 0 degrees Celsius\n\nthe colder the faster
629453
warm water dissolves ice faster than warm air because it can transfer and absorb heat faster than warm air of the same temperature
1117740
since the heat evolced is dissipated in 100 ml in the first case (by 2 g of NaOH) and in 200 ml of water in the second case (by 4 g of NaOH) the net change in the temperature of water remains same. hence 'a' is the correct answer\n answer : 'a'
1145151
A liquid will boil when its vapor pressure at the given temperature equals the [atmospheric] pressure above the liquid.\n\nI could not find a vapor pressure value of water at 90 degrees, but,\nAt 86 degrees F, the vapor pressure of water is about 31.8 mmHg.\nIf you lower the pressure above water to 31.8 mmHg at 90 degrees F, the water will boil.\n\n31.8 mmHg is about .042 atmospheres.
432258
Since it is at thermal equilibrium, the energy (q) of the water must equal the energy (q) of the metal.\n\nTherefore: mcAT = mcAT\n\n(90)(4.18)(0.9) = (11)(87.2)(c)\n\nSolving for c, the specific heat of the metal would be 0.353 J/g*oC