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April 18, 2014

Search: chem-calorimetry

Number of results: 14,267

chemistry calorimetry
sorry am not here to help however i need help i dont know how to do the calorimetry conclusion can anyone help
Thursday, January 18, 2007 at 10:28pm by zara

chem-calorimetry
I'm using nested styrofoam coffee cups
Monday, March 31, 2008 at 10:26pm by natash

chem-calorimetry
Yes, you have it set up correctly. Solve for Tfinal.
Monday, March 31, 2008 at 9:11pm by DrBob222

chem-calorimetry
I have assumed in the above that the final T of the water is NOT greater than 100. If it is another approach must be used.
Monday, March 31, 2008 at 9:11pm by DrBob222

chem-calorimetry
what approach do you suggest using to prevent your water sample from cooling off beore you start your measurements?
Monday, March 31, 2008 at 10:26pm by natash

chem-calorimetry
I don't know enough about your experiment to answer. Are you using a bomb calorimeter of constant volume? A syrofoam cup calorimeter?
Monday, March 31, 2008 at 10:26pm by DrBob222

chem-Calorimetry
If the warm water in this experiment (Im not quite sure if you need more information) is at 98C, how much heat must be relesed in order for the temperature of 100. mL of water to decrease to 32C ?
Monday, March 31, 2008 at 9:10pm by natash

chem-calorimetry
Knowing as little as I do about the experiment, have what you need pre-measured, pre-weighted, equipment ready to go, and make the addition of the hot water to last thing you do before starting mesurments.
Monday, March 31, 2008 at 10:26pm by DrBob222

Calorimetry Chemistry
Sorry about that. http://www.chem.ufl.edu/~itl/2045/lectures/lec_9.html
Tuesday, September 23, 2008 at 1:57am by DrBob222

chem-calorimetry
If a 5.26-g sample of copper at 258C is placed in 125mL of water at 21.0C, how hot will the water get? Assume no heat loss to the surroundings. The specific heat of copper is .385 J/g C
Monday, March 31, 2008 at 9:11pm by natash

Chemistry
What is the importance of maintaining an isolated system in calorimetry experiments? I know the basic parts - calorimetry is the experimental process of measuring changes in a chemical system & an isolated system is one where neither matter nor energy can enter or leave. Why ...
Wednesday, November 26, 2008 at 10:32pm by Lucy X

chem-calorimetry
I'm a bit confused so is this the right way to set up the problem heat lost by Cu+heat gained by water=0 5.26g(.385)(Tf-258C)+125g(4.18)(Tf-21C)=0 then you solve for Tf?
Monday, March 31, 2008 at 9:11pm by natash

chem-Calorimetry
q = mass water x specific heat water x delta T. 100 mL H2O = 100 g. specific heat water = 4.184 J/g*C delta T = 98-32.
Monday, March 31, 2008 at 9:10pm by DrBob222

Calorimetry
idk
Tuesday, September 23, 2008 at 1:53am by Anonymous

Calorimetry
wow
Tuesday, September 23, 2008 at 1:53am by Anonymous

Chemistry Help(Calorimetry)
I have a few questions to ask, since I was absent from school and I do not really understand the calorimetry problems. 1) When a 16.9 g sample of NaOH dissolves in 70.0 g of water in a calorimeter, the temperature rises from 22.4*C to 86.6*C. Calculate for Delta H for the ...
Friday, April 9, 2010 at 1:37am by Bonn

chem
another calorimetry experiment is performed in which a 500. gram peice of gray metal at 67 degrees celsius is added to 493 grams of water. the water's temperature, originally at 17 degrees celsius, changes to 22 degrees celsius. What is the specific heat of the gray metal? I ...
Thursday, April 24, 2008 at 10:08am by miley

Calorimetry Chemistry
What the good site?
Tuesday, September 23, 2008 at 1:57am by Anonymous

Calorimetry
-30.2 kJ/mol
Tuesday, September 23, 2008 at 1:53am by Anonymous

Chemistry Help(Calorimetry)
rich china johnny ray
Friday, April 9, 2010 at 1:37am by billy

physics
Explain how the specific heats of materials are measured using the technique of calorimetry.
Thursday, April 19, 2012 at 9:54am by William

chem
im working on a lab in chemistry called measuring energy changes :Calorimetry how to you determine the molar latent heat of fusion of ice using q=mcT ?? why was the ice driedbefore it was placed in water? why is hot warer ysed rather than room temp? in which dirextion would ...
Thursday, February 11, 2010 at 10:20am by jess

chemistry
That depends upon what you are doing with the water. Taking a bath with it, drinking it, performing calorimetry, just what?
Thursday, October 23, 2008 at 5:11pm by DrBob222

Chemistry
Same as any calorimetry method except use some liquid that will not react with water (and of course one for which you know the specific heat).
Monday, October 15, 2007 at 8:36pm by DrBob222

Calorimetry Chemistry
okay but i dont know where to star i would like an explanation if no one minds or a good link relating to this information.
Tuesday, September 23, 2008 at 1:57am by Sarah

chem-calorimetry
heat lost by Cu + heat gained by water = 0 mass x specific heat Cu x delta T = q Cu. mass x specific heat H2O x delta T = q H2O. delta T is Tfinal-Tinitial. You are given the initial T for both Cu and water, Tf is the unknown for which you solve. You must look up the specific ...
Monday, March 31, 2008 at 9:11pm by DrBob222

Physics
3. The quantity 0.850kg of ice at -20 degrees Celsius is added to 1.100kg of water in an aluminum Calorimetry cup at 7 degrees Celsius. The mass of the Calorimetry cup is 0.250kg. Use your knowledge of specific heats and latent heats to determine the temperature for the ice/...
Tuesday, January 22, 2013 at 5:44pm by Dawna

Calorimetry Chemistry
Here is a good site to start you. Repost here with specific questions.
Tuesday, September 23, 2008 at 1:57am by DrBob222

chemistry
A 445 g sample of ice at 58oC is heated until its temperature reaches 29oC. Find the change in heat content of the system.
Monday, September 10, 2012 at 4:35pm by Calorimetry problem

Chemistry
Can someone explain to me what the calorimetry equation - q=(m)(ΔT)(Cp) means exactly, in your own words, and how identifying an unknown metal relates to every day life? thanks
Wednesday, October 13, 2010 at 6:47pm by Kate

Chemistry Help(Calorimetry)
Convert 34.5 in2 to cm2. Report the answer to the correct number of significant figures. (1 inch = 2.54 cm is an exact or defined conversion.)
Friday, April 9, 2010 at 1:37am by lisa

Calorimetry
thats not really helpful to students who need chistry help..at least the tudors will give you a generic format to get you started. saying you dont do homework doesnt benfit anyone..you have wasted our time
Tuesday, September 23, 2008 at 1:53am by Anonymous

Chemistry - Heat of Fusion of Ice
i believe calorimetry displays the law of conservation of energy because in the calorimeter, heat/energy is neither gained nor lost.
Sunday, October 1, 2006 at 2:11pm by Anonymous

chem!
A common flaw in calorimetry experiments to determine the molar enthalpy of solution is to have a mass of solute that is inappropriate for the volume of water used resulting in a temperature change that is too small or too large. A temperature change of 5C to 10C is a good ...
Saturday, April 14, 2007 at 2:51pm by bob

Physical Chemistry
In terms of bomb calorimetry, can one assume the temperature of the water surrounding the cmopartment is equal to the temperature within the compartment? If not, how would one determine T for the reaction occuring inside the compartment?
Saturday, January 26, 2008 at 11:08pm by xX_Supaman_Xx

calorimetry
please, someone answer my question i posted already I answered your question within 15 minutes. It is posted. Hit the refresh button of your computer. sorry that my question took youthat long, but it was of great help. glad to help. Thanks for using Jiskha.
Thursday, January 18, 2007 at 11:16pm by claudia

Thermochemistry, calorimetry
The density of ice is 0.9168 g/cm3. The density of water is 0.9998 g/cm3. Calculate the difference between ΔU (internal energy) and ΔH (enthalpy) during the fusion of 2.5 moles of ice at atmospheric pressure.
Tuesday, November 20, 2012 at 6:38pm by Peter

AP Chem
I looked at the first four, they are right. Dont you work with someone on chem homework? Like a study group? That is a very effective way to work chem and physics problems.
Wednesday, November 19, 2008 at 11:22am by bobpursley

Chemistry
In lab we conducted a calorimetry experiment with a peanut. We burned a half a peanut and placed it underneath a pop can with 50mL of water inside. One of our questions is why heat transfer to the pop can isn't accounted for when calculating heat generated and why it's ...
Monday, April 19, 2010 at 6:27pm by Anonymous

calorimetry
if 158 grams of silver at a temperature of 98.5 degrees celcius is placed in a styrofoam cup of 85 grams of water at 13 degrees celcius, what would the final temperature of the water be in two minutes
Wednesday, February 25, 2009 at 4:19pm by moe

calorimetry
There is a difference between turning and burning pecans. The water heats up by 46 degrees due to the burning. Heat added to the water is 100*46 = 4600 calories or 4.6 "food" Calories. That is 1.8 food Calories per gram. That number is much too low.
Thursday, December 6, 2012 at 10:36pm by drwls

Chemistry
what about caloriometry? Use a caloriometer and find the temperatures with a digital thermometer. You need to take the water and find the initial temperature, then add the sodium and then mix the sodium in there until it is fully dissolved and then measure the new temperature...
Friday, September 14, 2007 at 7:31pm by Meredith

physics
Suppose 0.0150 kg of steam (at 100.00C) is added to 0.150 kg of water (initially at 19.3C.). The water is inside a copper cup of mass 54.1 g. The cup is inside a perfectly insulated calorimetry container that prevents heat flow with the outside environment. Find the final ...
Tuesday, April 5, 2011 at 6:49am by please help me

physics
Suppose 0.0150 kg of steam (at 100.00C) is added to 0.150 kg of water (initially at 19.3C.). The water is inside a copper cup of mass 54.1 g. The cup is inside a perfectly insulated calorimetry container that prevents heat flow with the outside environment. Find the final ...
Tuesday, April 5, 2011 at 10:41am by John

physic
Suppose 0.0150 kg of steam (at 100.00C) is added to 0.150 kg of water (initially at 19.3C.). The water is inside a copper cup of mass 54.1 g. The cup is inside a perfectly insulated calorimetry container that prevents heat flow with the outside environment. Find the final ...
Friday, April 8, 2011 at 9:00am by help me please

physics
Suppose 0.0290 kg of steam (at 100.00C) is added to 0.290 kg of water (initially at 19.7C.). The water is inside an aluminum cup of mass 44.7 g. The cup is inside a perfectly insulated calorimetry container that prevents heat flow with the outside environment. Find the final...
Saturday, April 9, 2011 at 8:51am by jason

Chemistry
Hello, I had a lab about calorimetry and one of the questions was if the reaction of acetone with hypochlorite is an oxidation/reduction or acid/base. Would the answer be: oxidation/reduction because the oxygen from the hydroxide from the Sodium hydroxide detaches and joins ...
Wednesday, May 16, 2012 at 8:45pm by Robert

calorimetry
mass Ag x specific heat Ag x (Tfinal-Tinitial) + mass H2O x specific heat water x (Tfinal-Tinitial) = 0 Substitute the numbers and solve for the only unknown, Tfinal. However, I don't know that this will occur in two minutes. By the way, note the correct spelling of celsius.
Wednesday, February 25, 2009 at 4:19pm by DrBob222

Chemistry Help(Calorimetry)
the number of calories needed to raise the temperature of 100 grams of water 10 degrees Celsius is the same as the number of calories needed to raise the temperature of 1,000 grams of water what amount?
Friday, April 9, 2010 at 1:37am by catalina

Chemistry Help(Calorimetry)
the number of calories needed to raise the temperature of 100 grams of water 10 degrees Celsius is the same as the number of calories needed to raise the temperature of 1,000 grams of water what amount?
Friday, April 9, 2010 at 1:37am by catalina

Physics
An aluminum calorimetry cup [mc = 0.6 kg, cc = 0.22 kcal/(kgC)] is filled with water [mw = 2.4 kg, cw = 1 kcal/(kgC)]. It is at a temperature of 30C. A sample of an unknown substance with mass mm = 2.34 kg, originally at a temperature of 210C, is added. After a while, the ...
Friday, January 17, 2014 at 6:25pm by Randall

Physics
An aluminum calorimetry cup [mc = 0.6 kg, cc = 0.22 kcal/(kgC)] is filled with water [mw = 2.4 kg, cw = 1 kcal/(kgC)]. It is at a temperature of 30C. A sample of an unknown substance with mass mm = 2.34 kg, originally at a temperature of 210C, is added. After a while, the ...
Friday, January 31, 2014 at 10:56am by Randall

Physics
An aluminum calorimetry cup [mc = 0.6 kg, cc = 0.22 kcal/(kgC)] is filled with water [mw = 2.4 kg, cw = 1 kcal/(kgC)]. It is at a temperature of 30C. A sample of an unknown substance with mass mm = 2.34 kg, originally at a temperature of 210C, is added. After a while, the ...
Monday, February 3, 2014 at 1:54pm by Riley

chem
I DONT GET WHATS DONE.. DR.Bob22 - could u please explain this again..thank u
Tuesday, February 17, 2009 at 12:10am by CHEM

chem help
ok thanks alot... the PartB asks for: What is the percent ionization of ammonia at this concentration?
Saturday, February 28, 2009 at 11:56pm by chem

CHEM organic chem
Responded above to a later repost.
Tuesday, November 13, 2007 at 6:18pm by DrBob222

gen chem
i tried that, apparently its not the right answer either =/.
Saturday, May 8, 2010 at 7:46pm by Chem

O.CHEM -> PLEASE CHECK!!
Thank you...good to know, but isn't there a "Dr.Russ" that works with Organic Chem??
Wednesday, March 12, 2008 at 9:48pm by K

chem
... This isn't in the right section. That's math, not chem. the answer though is, 23.
Wednesday, February 10, 2010 at 7:40pm by Nadia Samim

Chem
0.102 x 0.0821 x 273 / 1.0 what can i express this in the correct number of significant figures ?@_@
Wednesday, August 29, 2012 at 4:51am by Chem ):

Chem
maybe try using P1V1/n1T1 = P2V2/n2T2 ... im in chem too...
Saturday, February 27, 2010 at 1:16am by fellow student

chem
The answer on mast chem is 279 if you have 230 grams instead of 200.
Monday, February 15, 2010 at 4:46pm by Anonymous

G-chem/org. chem=>Dr. Bob222
I mean are setups differ for part 1
Friday, February 8, 2013 at 5:58pm by Devron

chem help
sorry the 2nd question is the right one
Saturday, February 28, 2009 at 11:56pm by chem

gen chem
yes, I figured that one out. Thanks so much for the help!
Sunday, May 9, 2010 at 3:42pm by Chem

organic chem
cadaverine is AKA pentane-1,5-diamine
Tuesday, April 26, 2011 at 5:18am by chem

organic chem
cadaverine is AKA pentane-1,5-diamine
Tuesday, April 26, 2011 at 5:18am by chem

chem
How to find the %(W/V) of 134mL of a 0.610 M solution of Mg(OH)2
Thursday, February 16, 2012 at 9:00pm by chem

chem
sorry read it wrong, doing this now in chem
Tuesday, March 19, 2013 at 6:02pm by Amanda

chem PLEASE HELP
I am very sorry. Chem is just not my thing and i looked in my notes the book and everything
Thursday, April 14, 2011 at 7:40pm by Sal

chem
ahh i hate chemisty, i'm kindof slow too and everything confuses me in chem.!! i feel the same way as you:)
Thursday, May 29, 2008 at 9:59pm by bethany

chem
Sarah, 4.70 is what you get when you do the -log (Ka)
Monday, April 4, 2011 at 1:24am by chem

Chem
1. 7.95 g 2. 7.956 g 3. 7.96 g 4. 7.960 g 5. 8.0 g 6. 8.00 7. none of the above Which is more the right choice....It can't be 7,6,5 for sure....But I thought it was 3. It's not 2.
Friday, February 8, 2008 at 3:13pm by Chem Help!!

Chemistry
so the first one is wrong too hmmm ! yeah ur reasoning makes sense ... i will ask my chem teacher too
Saturday, November 28, 2009 at 8:14pm by Chem Lover

gen chem
what must be the current in amperes to plate out 7.437g of Al from am aqueous solution of Al3+ in 5.4x10^2 minutes?
Saturday, May 8, 2010 at 6:56pm by Chem

G-chem/org. chem=>Dr. Bob222
I just looked at Dr. Bob222's post for when you initially posted this question and the setup that I gave you for part 1 differs from the setup that he gave you for part 2. I will let him resolve that for you since he has more experience in G-chem then I do, and he is probably ...
Friday, February 8, 2013 at 5:58pm by Devron

gen chem
what is "n" and thank you so much for all the help!
Saturday, May 8, 2010 at 7:46pm by Chem

gen chem
yes, it wants an actual value
Sunday, May 9, 2010 at 3:17pm by Chem

gen chem
that works! thank you so much!!
Sunday, May 9, 2010 at 3:42pm by Chem

Calorimetry Chemistry
Please help with these questions. Thanks Consider the reaction C12H22O11(s)+ 12O2(g)-->12CO2(g)+11H2O(l) <-- in which 10.0 g of sucrose,C12H22O11 , was burned in a bomb calorimeter with a heat capacity of 7.50 kJ/ degrees celsius. The temperature increase was found to be...
Tuesday, September 23, 2008 at 1:57am by Sarah

Calorimetry
The heat gained by the water in reaching equilibrium equals the heat lost by the metal. Assume that you know the specific heat of water is Cwater = 1.00 cal/g*C. Cmetal*6.128*(100-28.4) = Cwater*25*(28.4-23.6) Cmetal = 1.00*25*4.8)/[6.128*71.6] = 0.274 cal/(g*C)
Friday, June 24, 2011 at 12:14am by drwls

chem help
see the short paragraph and visual titled Predicting ion charges. http://antoine.frostburg.edu/chem/senese/101/atoms/
Saturday, November 24, 2007 at 7:59pm by bobpursley

Chem
Chemistry - A mixture of chromium and zinc weighing .362 g was reacted with an ... chemistry - Plastic articles can be chromium-plated by coating them with thin ... chem - Zinc dissolves in acid according to the balanced equation. Zn(s)+ 2H(aq... chem - Zinc dissolves in acid ...
Sunday, February 25, 2007 at 5:26pm by Anonymous

Chem
Chemistry - A mixture of chromium and zinc weighing .362 g was reacted with an ... chemistry - Plastic articles can be chromium-plated by coating them with thin ... chem - Zinc dissolves in acid according to the balanced equation. Zn(s)+ 2H(aq... chem - Zinc dissolves in acid ...
Sunday, February 25, 2007 at 5:26pm by Anonymous

Chem
Chemistry - A mixture of chromium and zinc weighing .362 g was reacted with an ... chemistry - Plastic articles can be chromium-plated by coating them with thin ... chem - Zinc dissolves in acid according to the balanced equation. Zn(s)+ 2H(aq... chem - Zinc dissolves in acid ...
Sunday, February 25, 2007 at 5:26pm by Anonymous

gen chem
2NO <-> N2 O2 initial .116 0 0 change -x +x +x equil .116-x x x
Sunday, May 9, 2010 at 3:42pm by Chem

chemistry - human calorimeter
From experience, you know that you produce significantly more heat when you are exercising than when you are resting. Scientists can study the heat that is produced by human metabolism reactions using a human calorimeter. Based on what you know about calorimetry, how would ...
Sunday, February 27, 2011 at 9:12pm by Farah

Intergated chemistry/physics
time=distance/velocity. This is a very odd question for "integerated" chem/physics. Where is the chem?
Wednesday, October 3, 2012 at 1:53pm by bobpursley

chem help
Ammonia,is a weak base with a Ka value of 1.8x10^-5 .What is the pH of a 0.22M ammonia solution?
Saturday, February 28, 2009 at 11:56pm by chem

chem help
Ammonia,is a weak base with a Kb value of 1.8x10^-5 .What is the pH of a 0.22M ammonia solution?
Saturday, February 28, 2009 at 11:56pm by chem

gen chem
yes I did, but im still not getting the right answer. I got .1136 which is not the correct answer.
Sunday, May 9, 2010 at 3:42pm by Chem

Chem
4.30 grams of NH4Cl is added to 14.5 grams of water. Calculate the molality of the solution
Monday, January 20, 2014 at 6:48pm by CHEM

chem: study of kinetics
he gave us an example of what the slope might be in class and it was -1.3x10^2 but my slop is completely different, was i supposed to do calculations? or just get the one from excel? what do i put in the 2 blanks?
Saturday, October 16, 2010 at 2:20pm by chem

ap chemistry
I agree on the tutor. Also, get another text (college used book store) to see the same material in differing words. On the ap chem board exam, nationally, most do not do well. I have to be honest, most ap chem students need to retake college chem if for nothing else, the lab ...
Sunday, November 4, 2012 at 4:07pm by bobpursley

physics
Suppose 0.0210 kg of steam (at 100.00C) is added to 0.210 kg of water (initially at 19.5C.). The water is inside a copper cup of mass 48.9 g. The cup is inside a perfectly insulated calorimetry container that prevents heat flow with the outside environment. Find the final ...
Friday, December 9, 2011 at 10:37am by maria

physics
Suppose 0.0210 kg of steam (at 100.00C) is added to 0.210 kg of water (initially at 19.5C.). The water is inside a copper cup of mass 48.9 g. The cup is inside a perfectly insulated calorimetry container that prevents heat flow with the outside environment. Find the final ...
Friday, December 9, 2011 at 12:39pm by maria

physics
Suppose 0.0210 kg of steam (at 100.00C) is added to 0.210 kg of water (initially at 19.5C.). The water is inside a copper cup of mass 48.9 g. The cup is inside a perfectly insulated calorimetry container that prevents heat flow with the outside environment. Find the final ...
Sunday, December 11, 2011 at 3:00pm by melisa

gen chem
what would Qc be if the pressure of the container decreased by a factor of 2.417 for the following reaction? 4Hcl(g)+O2(g)<-->2Cl2(g)+2H2O(g) Kc=13.298 @ 753K
Sunday, May 9, 2010 at 3:17pm by Chem

In your opinion=> has it payed off for you Dr.Bob? (I need some advice)
I don't know where to start but I was thinking of changing my major to chemistry but that would require me to go to another school since mine doesn't have a chemistry major. This is rather ironic since they have all the major chem classes needed to get a chemistry degree and I...
Tuesday, March 25, 2008 at 9:50pm by ~christina~

chem
The larger an atom the farther the electrons are away from the nucleus; therefore, the easier it is to distort them. Here is a site that talks about that. http://www.chem.purdue.edu/gchelp/liquids/disperse.html
Friday, November 28, 2008 at 4:49pm by DrBob222

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