I need to find the specific heat of a metal but to do that I have to use the mass of water. I'm only given that there is 50.0 mL of water. what is the formula to find the mass of 50.0mL of H20?
thanks!
-SelArom
2006-11-15 17:27:58 · 7 answers · asked by SelArom 1 in Science & Mathematics ➔ Chemistry
lol thanks everyone, didn't realize it was such a duh :) my teachers suck I never learned this!
thanks everyone :)
2006-11-15 18:05:32 · update #1
OMG!
i have the same question!
mine is:
A piece of an unknown metal has a mass of 20.0 g and at 100.0 C is placed in a styrofoam cup calorimeter containing 50.7 g of water at 22 C. If the final temp is 27.2 C, calculate the specific heat capacity of the metal. Assume that all the energy lost by the metal is gained by the water.
ok, haha fine, not the SAME question, but close enough. But, i'm uber confused. ><
2006-11-15 18:59:21 · answer #1 · answered by mangodroplet 2 · 0⤊ 0⤋
A ml of water = one gram, so 50ml will = 50 grams. Also the specific heat of water is 4.2 J/g degree Centigrade. The specific heat of most metals is much lower. Gold for example has a specific heat of 0.128 J/g degree Centigrade That means if you take a piece of hot gold say a gram or two and drop it into 50 grams of water the metal will be cooled down instantly but the temperature of the water will go up only slightly. That's why they use water and it's high specific heat absorbing properties for cooling towers at nuclear reactor sites to absorb all that excess heat.
2006-11-15 18:01:59 · answer #2 · answered by waldon l 2 · 0⤊ 0⤋
The mass of water is 1 gram per ml, or 1 kg per liter
2006-11-15 17:29:26 · answer #3 · answered by gp4rts 7 · 0⤊ 0⤋
You don't need a formula to find out the mass of water if you are given its volume, seeing that 1mL of water is equivalent to 1g of water :) Thus 50mL of water ===> 50g.
Then, I believe you use 'change in enthalpy = m x specific heat capacity of water x change in temperature'
Good luck!
2006-11-15 17:52:49 · answer #4 · answered by K&Y 1 · 0⤊ 0⤋
50 ml =50 cm squared= 50 grams
not sure but look in a coversion table
hey you should have totally learned in grade 10
in fact I learned it in grade 8
remember it for the REST OF YOUR LIFE
just kidding
I just remember this stuff automatically
2006-11-15 17:31:41 · answer #5 · answered by Sakura Haruno 3 · 0⤊ 0⤋
By definition, it is 50 grams.
A gram is defined as the mass of one cubic centimeter (one milliliter) of water.
2006-11-15 17:30:42 · answer #6 · answered by Anonymous · 0⤊ 0⤋
m[mass] = n[mol] x M[molar mass]
two ways i know of to find n[mol]
n = mass/molar mass
n = concentration x volume
omgoodness, im so not that good at chemistry!!! conversion table! eck!
2006-11-15 17:33:48 · answer #7 · answered by Anonymous · 0⤊ 0⤋