Monday
July 28, 2014

Search: Determine how much heat is evolved or absorbed when 25.0 of lithium iodide completely dissolves in water

Number of results: 41,338

chemistry
Determine how much heat is evolved or absorbed when 20.0 of lithium iodide completely dissolves in water.
February 1, 2010 by cindy

chemistry
Determine how much heat is evolved or absorbed when 40.0 g of lithium iodide completely dissolves in water.
September 5, 2011 by Sara

chemistry
How much heat is evolved or absorbed in this problem? Question Details Limestone, CaCo3, when subjected to a temperature of 900 degrees Celsius in a kiln, decomposes to calcium oxide and carbon dioxide. How much heat is evolved or absorbed when one gram of limestone decomposes...
March 3, 2012 by Anonymous

chemistry
How much heat is evolved or absorbed in this problem? Question Details Limestone, CaCo3, when subjected to a temperature of 900 degrees Celsius in a kiln, decomposes to calcium oxide and carbon dioxide. How much heat is evolved or absorbed when one gram of limestone decomposes...
March 3, 2012 by Anonymous

chemistry
How much heat, in kilojoules, is evolved when a 3.70 kg sample of molten Cu freezes? The normal boiling point is 1357 K, and heat of fusion is 13.05 KJ/mol. 2.) How much heat must be absorbed at 1357 K to melt a bar of copper (80 * 10 * 12 cm) assume d = 8.93 g/cm^3.
February 15, 2010 by Andrew

chemistry
How much heat, in kilojoules, is evolved when a 3.70 kg sample of molten Cu freezes? The normal boiling point is 1357 K, and heat of fusion is 13.05 KJ/mol. 2.) How much heat must be absorbed at 1357 K to melt a bar of copper (80 * 10 * 12 cm) assume d = 8.93 g/cm^3.
February 15, 2010 by Andrew

chemistry
Consider the following reaction: 2H2 (g) + O2 (g)  2H2O (l) ΔH = -572 kJ a. How much heat is evolved for the production of 1.00 mol H2O (l)? b. How much heat is evolved when 4.03 g hydrogen is reacted with excess oxygen? c. How much heat is evolved when 186 g ...
November 9, 2012 by Anonymous

Chemistry
How much heat (in kilojoules) is evolved or absorbed in the reaction of 3.35 of with enough carbon monoxide to produce iron metal?
December 10, 2012 by LaK

Chemistry
How much heat (in kilojoules) is evolved or absorbed in the reaction of 2.65 g of Na with H2O? 2Na+2H2O ---> 2NaOH + 2H2 Delta H= -368.4
February 17, 2010 by Anonymous

Lauren
The specific heat of water is at 4.184J/g * degree C. How much heat is evolved, or absorbed, when the temperature of 9.00 mol of liquid water cools from 38 degrees C to 28 degrees C? How do I start this problem
November 16, 2007 by Chemistry

Chemistry
How much heat is evolved when 500kg of Ammonia is evolved according to the following equation: N2(g)+3H2(g)<->2NH3(g) [deltaH =-91.8K]
January 31, 2014 by Adigun

Chemistry
How much heat (in kilojoules) is evolved or absorbed in the reaction of 2.90g of Fe2O3 with enough carbon monoxide to produce iron metal? Fe2O3 + 3CO ---> 2Fe + 3CO2 dH=-24.8kJ How do you find q (of the 2Fe in kJ).
April 6, 2011 by Chris

Physical Science
How much heat is absorbed by pouring 10 grams of 100C liquid water on a students hand. The water is cooled to body temperature, 37C. Assume that all of the heat is absorbed by the hand
October 22, 2012 by Kayden

Chemistry
If 15.0 mL of a 1.5M HCl solution at 22.5 degrees C is mixed with 25.0mL of a 1.5M NaOH solution at 21.5 degrees C that is in a calorimeter, and the final mixed solution temperature ends up at 28.5 degrees C, 1.)what is the balanced equation for this reaction? 2.) what is the ...
April 13, 2014 by Jennifer

Chemistry
4 NH3(g) + 5 O2(g) 4 NO(g) + 6 H2O(g) If standard enthalpy change is -906.2 kJ, what quantity of heat is evolved or absorbed in the formation of 17.0 g of NH3?
May 1, 2011 by Kat

Chemistry
How much heat is either ______(absorbed or given off) when 91.45g of HI decomposes to H2 and I2 at 25 degrees C? What goes in the blank and how much heat? Thanks!
April 29, 2012 by Greg

Science
1. How much heat energy is lost by 3 kg of water when it cools from 80 degrees C to 10 degrees C? 2. A 300 g piece of aluminum is heated from 30 degrees C to 150 degrees C. What amount of heat energy is absorbed? 3. Determine the temperature change in each of the following. (a...
October 23, 2011 by Debra

chem
The normal melting point of copper is 1357 K and heat of fusion of Cu is 13.05 KJ. How much heat, in kilojoules, is evolved when a 3.70 kg sample of of molten Cu freezes?
February 11, 2010 by Joseph

Chemistry
Help with lab report Need Help finishing my lab report.KNOWN VALUES ARE V OF HCL=50ML,M=2.188.V OF NAOH=55.3ML,M=2.088.INTIAL TEMP FOR HCL=22.5C,NAOH IS 23C.this is for part A: Mass of final NACL solution assuming that the density of a 1 M Nacl solution is 1.04 g/ml? Heat ...
October 26, 2012 by randy

Chemistry
Use your value for the heat of neutralization, ∆H, -9490, to determine the amount of heat evolved when 10.00mL of 0.4091 M HCL reacts with 10.00mL of 0.4037 M NaOH.
January 9, 2012 by Kelsey

chemistry (combustion and heat)
How much heat is evolved when 5.00g of propane C3H8 burns completely. I got the formula down, now what? C3H8 + 5O2 -> 3CO2 + 4H2O
November 20, 2010 by Anonymous

Chemistry
When pure sulfuric acid is dissolved in water,heat is evolved.To a calorimeter containing 300g of water at 20degree C,10.65g of sulfuric acid also added at the same temperature.The change in temperature,which was monitored by a digital probe with negligible heat capacity ...
March 22, 2012 by Meenaakshi

college chem
How much heat is absorbed by the calorimeter if the temperature change is 8 C and the calorimeter constant (Heat Capacity) is 3.3 J/K? Your Answer:
March 8, 2010 by debra

Tennessee State University
How much heat is absorbed by the calorimeter if the temperature change is 12 C and the calorimeter constant (Heat Capacity) is 3.3 J/K?
March 21, 2010 by Aaron

Tennessee State University
How much heat is absorbed by the calorimeter if the temperature change is 12 C and the calorimeter constant (Heat Capacity) is 3.3 J/K?
March 21, 2010 by Aaron

Tennessee State University
How much heat is absorbed by the calorimeter if the temperature change is 12 C and the calorimeter constant (Heat Capacity) is 3.3 J/K?
March 21, 2010 by Aaron

Chemistry
The density of a 1.0 M solution of NaCl is 1.04 g/mol and its specific heat, c, is 3.60 J/C*g. How much heat is absorbed by 31.4 mL of this solution if the temperature rises from 18.6 C to 29.7 C?
October 19, 2010 by Sarah

chemistry
the temperature of a 20.0g sample of a metal(specific heat .03 J/g-C) is raised by 20C. How much heat has been absorbed by the metal?
July 13, 2011 by matt

Chemistry
A 5.80 g sample of SiH4 and an excess of oxygen were placed in a reaction container surrounded by 3.40 kg of water. The initial temperature of the water was 14.10C. At the end of the reaction, the temperature of the water was 48.90C. Assume the heat was completely absorbed ...
March 8, 2010 by Megan

science
The density of a 1.0 M solution of NaCl is 1.04 g/mL and its specific heat, c, is 3.06 J/C*g. How much heat is absorbed by 3.14 mL of this solution if the temperature rises from 18.6C to 29.7C? q=m*C*delta T (1.04g)(3.06)(11.1K)=35.32 is that right?
October 22, 2009 by megan

chemistry
How much heat is absorbed by the calorimeter if the temperature change is 8C and the calorimeter constant (Heat Capacity) is 3.3 J/K?
March 31, 2008 by depressed

chemistry
How much heat is absorbed by the calorimeter if the temperature change is 8 C and the calorimeter constant (Heat Capacity) is 3.3 J/K?
March 8, 2010 by debra

chemistry
How much heat is absorbed by the calorimeter if the temperature change is 8 C and the calorimeter constant (Heat Capacity) is 3.3 J/K?
June 18, 2010 by tsu

chemistry
How much heat is absorbed by the calorimeter if the temperature change is 10 C and the calorimeter constant (Heat Capacity) is 3.3 J/K?
November 3, 2011 by Ashley

Chemistry II
The total volume of hydrogen gas needed to fill the Hidenbrug was 2.0e8 L at 1.0 atm and 25 degrees Celsius. How much heat was evolved when the Hidenburg exploded, assuming all the hydrogen reacted? I will be happy to critique your thinking on this. First, calculate the moles ...
May 20, 2007 by Jayd

science
How much heat is absorbed when 52.3 g H2O(l) at 100C and 101.3 kPa is converted to steam at 100C? (The molar heat of vaporization of water is 40.7 kJ/mol.)
June 27, 2013 by michael

chemistry
when 25.0 of lithium iodide completely dissolves in water how much heat is evolved
February 4, 2010 by Anonymous

chemistry
How much heat is evolved when 1258 g of water condenses to a liquid at 100.C?
May 10, 2010 by samantha

Chemistry
How much heat is evolved when 6.688 moles of Cu(s) is burned in excess oxygen
January 19, 2011 by Hector Smith

chemistry
2.) How much heat must be absorbed at 1357 K to melt a bar of copper (80 * 10 * 12 cm) assume d = 8.93 g/cm^3. The normal boiling point is 1357 K, and heat of fusion is 13.05 KJ/mol.
February 15, 2010 by Andrew

chemistry
When 5 grams of salt is dissolved in 95 grams of water the temperature of the solution increases 10C how much heat is evolved the heat capacity of the solution is 1.1 cal/gC
October 7, 2013 by Cheryl

College chemistry
How much heat (in kJ) is evolved in converting 1.00 mol of steam at 130.0 C to ice at -50.0 C? The heat capacity of steam is 2.01 J/g*C and of ice is 2.09 J/g*C.
January 18, 2010 by eddie

Chemistry
1. How much heat is absorbed when 63.7g H(small 2)O [water](l) at 100 degrees C and 101.3 kPa is converted to steam at 100 degrees C? Express your answer in kJ. Is there an equation? 2.How much heat (in kJ) is released when 0.677 mol NaOH(s) is dissolved in water? (Steps?) ...
May 12, 2010 by Anonymous

Chemistry
If 1.22 grams of magnesium reacts with 100 ml of 6.02 M HCl solution. How much heat is evolved? Density of the HCl solution is 1.10 g/ml. Assume the specific heat of water 4.184 J/gC is the specific heat of the solution. Mg + 2 HCl MgCl2 + H2
July 17, 2012 by Anonymous

ocean county college
A 150 g sample of metal at 55.0 C raises the temperature of 150 g of water from 23.0 C to 35.0 C. Determine the specific heat of the metal in J/g C. Hint: #1 First find heat absorbed by water using formula q = mass x specific heat x change in temp (of water). #2 Use this value...
March 21, 2010 by adina

chemistry
How much heat is evolved when 267 g of ammonia gas condenses to a liquid at its boiling point?
March 24, 2010 by pjl

chemistry
How much heat is evolved when 269 g of ammonia gas condenses to a liquid at its boiling point?
May 10, 2010 by samantha

chemistry
How much heat is evolved when 269 g of ammonia gas condenses to a liquid at its boiling point?
May 10, 2010 by brett

chemistry
How much heat (in g ) is evolved in converting 1.00 of steam at 145.0 to ice at -45.0? The heat capacity of steam is 2.01 and of ice is 2.09 .
August 27, 2010 by sara

chemistry
How much heat (in ) is evolved in converting 1.00 of steam at 150.0 to ice at -55.0? The heat capacity of steam is 2.01 and of ice is 2.09 .
July 10, 2011 by hannah

chemistry
How much heat (in ) is evolved in converting 1.00 of steam at 150.0 to ice at -55.0? The heat capacity of steam is 2.01 and of ice is 2.09 .
July 10, 2011 by hannah

Physics
A 0.4 kilogram sample of Aluminum at 115 degrees Celsius is put into a container containing 0.5 kilograms of water at 15 degrees Celsius. Neglecting the small amount of energy absorbed by the container and knowing that the specific heat of Aluminum is 900 kJ/kg*C, and the ...
July 17, 2014 by Anna

chemistry
how much heat is absorbed if 200g of water changes from 20 C to 80 C?
February 12, 2009 by Renita

chemistry
k we did a lab and i dont understnad how to do this part... Determine the heat absorbed by the solution, which raises its temp.
April 20, 2008 by trista

chemistry
Determine the specific heat of a material if a 27.3 g sample absorbed 44.2 J as it was heated from 293 K to 336 K.
March 17, 2014 by Bubba

Physics
2. Suppose you pour 15 g of hot water (at 55 oC) into a glass that contains 20 g of ice (at - 10 oC). Neglect the heat absorbed in the glass itself. a. How much heat would the water give up to get cooled to the melting point? b. How much heat would it take to get the ice to ...
November 19, 2012 by Jonathan

Physics HELP!
2. Suppose you pour 15 g of hot water (at 55 oC) into a glass that contains 20 g of ice (at - 10 oC). Neglect the heat absorbed in the glass itself. a. How much heat would the water give up to get cooled to the melting point? b. How much heat would it take to get the ice to ...
November 19, 2012 by Jonathan

Chemistry
Calories of heat absorbed by water = (Mass undergoing change)(Change in temp.)How much heat is needed to warm 125 g. of water from 25 degrees Celsius to 100 degrees Celsius. Thank you very much!
January 30, 2013 by Larissa Jenkinson III

Chemistry
If the temperature of 150.0g of water increased from 23.3C to 44.8C, how much heat was absorbed
April 9, 2013 by Joel

Science
How much heat is absorbed when 500g of water goes from 25 to 35 degrees
December 29, 2013 by David

chemistry
KCl(s) → K+(aq) + Cl‾ (aq) Solid KCl dissolves as shown in the above equation. A 6.60 g sample of KCl was dissolved in 42.3 g of water. The initial temperature of the water was 21.90C. After the compound dissolved, the temperature of the water was 10.20C. Assume ...
September 26, 2012 by sam

Chemistry :(
How much heat is evolved when 878 kg of ammonia is produced according to the following equation? N2(g) + 3H2(g) 2NH3(g) ΔH = -91.8 kJ
April 20, 2011 by Bethany

physics
A transfer of heat occurs with a pot of 8.0 kg of water that changes from 400 degrees kelvin to 320 degrees kelvin. How much heat is absorbed or given off?
October 19, 2008 by sammi

Chemistry!
Hey jiskha. Microwave ovens emit microwave radiation that is absorbed by water. The absorbed radiation is converted to heat that is transferred to other components of the food. Suppose that the microwave radiation has a wavelength of 12.7 cm. How many photons are required to ...
November 14, 2010 by Alex

Chemistry
LiI(s) → Li+(aq) + I‾ (aq) Solid LiI dissolves as shown in the above equation. A 8.00 g sample of LiI was dissolved in 57.5 g of water. The initial temperature of the water was 21.40C. After the compound dissolved, the temperature of the water was 37.13C. Assume ...
February 10, 2010 by Sug

College Chem
How much heat (in kJ) is absorbed when 10.0mL of liquid ethanol vaporizes?
September 27, 2010 by Logan

physics
How much heat is absorbed by an electric refrigerator in charging 2 Kg of water at 15C to ice at 0C?
March 9, 2011 by aj

More chemistry
Hey jiskha. Microwave ovens emit microwave radiation that is absorbed by water. The absorbed radiation is converted to heat that is transferred to other components of the food. Suppose that the microwave radiation has a wavelength of 12.7 cm. How many photons are required to ...
November 14, 2010 by Alex

Chem 2 enthalpy
How much heat is evolved when 25.5 g of benzene freezes at 5.5 Celcius (molar heat of fusion is 9.94 kJ/mol and molar mass of benzene= 78.0 g/mol)
August 26, 2010 by Anonymous

Chemistry
How much energy, in kj, is absorbed by 23.8g of acetone when it evaporates if its molar heat of vaporization is 32.0 kj/mol?
April 22, 2013 by Jill Hoff

physics
How much heat must be absorbed by a 500 g pot of water in order to raise the temperature from 20aC to 30aC?
July 5, 2011 by Raja

Chemistry
if the temperature of a 500.0g sample of liquid water is raised to 2.00c how much heat is absorbed by the water? The specific heat of liquid water is 4.184J/(g*c)
February 23, 2010 by Anonymous

chemistry
If the temperature of a 500.0-g sample of liquid water is raised 2.00c how much heat is absorbed by the water?The specific heat of liquid water is 4.184j/(g*c)
January 25, 2013 by gabriella

Chemistry
The standard enthalpy of formation of Al3-(aq) is -538.4kJ/mol. How much heat is evolved when 0.3724 g of Al(s) reacts with excess hydrochloric acid?
January 9, 2012 by Kelsey

chemistry
How much heat is absorbed by a 2000 kg granite boulder as energy from the sun causes its temperature to change from 8C to 26C?
April 20, 2010 by reily

General Chemistry
How much heat is absorbed by a 25.0-g sample of gold at 25.0 degrees celcius when it is immersed in boiling water?
October 15, 2010 by Saw

chemistry
How much heat is absorbed by a 2000 kg granite boulder as energy from the sun causes its temperature to change from 7C to 24C?
March 30, 2012 by Anonymous

physical science
how much heat is absorbed by contacting 10 grams of 100 degree C steam by a students hand.
October 22, 2012 by Anon

chemistry
How much heat in kilojoules is evolved in converting 1.00 mol of steam at 145 Celsius to ice at -50 Celsius?
June 23, 2010 by nano

chemistry
CH3OH  CO + 2H2 H = +90.7kJ 9. For the forward reaction, is heat being absorbed or released? 10. How much heat would be transferred if 45.0 g of CH3OH is decomposed? 11. What quantity of CH3OH decomposition would lead to an enthalpy change of 18.5 kJ
May 11, 2011 by Anonymous

chemistry
CH3OH  CO + 2H2 H = +90.7kJ 9. For the forward reaction, is heat being absorbed or released? 10. How much heat would be transferred if 45.0 g of CH3OH is decomposed? 11. What quantity of CH3OH decomposition would lead to an enthalpy change of 18.5 kJ
May 11, 2011 by Anonymous

chemistry
How much heat energy in KJ is evolved by a reaction in a calorimeter in which the temperature of the calorimeter and water increases from 20.91 degrees C to 26.45 degrees C? The bomb has a heat capacity of 469 J/degrees . The Calorimeter contaains 792 grams of water.
December 8, 2010 by Brittany

6th grade science
What happens to energy from the sun that is neither reflected nor absorbed by the atmosphere? Is this right? It is absorbed by the land and water and warmed(changed to heat). The greenhouse effect takes place.
September 11, 2010 by Camryn

chemistry
determine the specific heat of a material if a 35.0 g sample absorbed 48.0 J as it was heated from 20 Celsius to 40 Celsius.
September 27, 2010 by Courtney

Chemistry
Hi. I need some help with this. When you stretch a balloon against your lips, is heat given off or absorbed? Which driving force is dominating this change, the tendency toward lower energy or the tendency toward disorder? Heat is given off obviously but I don't know what to ...
January 28, 2007 by Lisa

science
why does the mountain tops stay snowy all year round The air temperature is below that necessary to melt the snow. the air is too thin to holh very much heat at those altitudes.aLSO, The snope reflects 90%of the incoming light, which further supresses the totat heat absorbed.
November 1, 2006 by james bandit

Chemistry
Deterioration of buildings, bridges, and other structures through the rusting of iron costs millions of dollars everyday. Although the actual process also requires water, a simplified equation (with rust shown as iron(III) oxide (Fe2O3) is: 4Fe(s)+3O2(g) --> 2Fe2O3(s) delta...
February 21, 2010 by Kaylene

chemistry
how much heat (in KJ) is evolved in coverting 1.00 mol of steam at 135.0 degrees celcius to ice at -45.0 degrees celcius? the heat capacity of steam is 12.0 J/g * C and ice is 2.09 J/c * C.
February 7, 2009 by reese

Physics
To help prevent frost damage, fruit growers sometimes protect their crop by spraying it with water when overnight temperatures are expected to go below the freezing mark. When the water turns to ice during the night, heat is released into the plants, thereby giving them a ...
December 11, 2012 by Anonymous

Chemistry
How much heat is absorbed by a 2000 kg granite boulder as energy from the sun causes its temperature to change from 10c to 29c?
February 21, 2010 by Anonymous

Chemistry
2H2+O2 -> 2H20 changeHrxn=-484 KJ Which answer best describes the transfer heat that occurs when 1.30 mol of H2 reacts? 629 KJ released 315 KJ absorbed 315 KJ released 484 KJ absorbed 484 KJ released 629 KJ absorbed
October 9, 2012 by Anonymous

chemistry
3.6 g of a hydrocarbon fuel is burned in a calorimeter that contains a 244 grams of water initally at 25.00 degrees C. After the combustion the temperature is 26.55 degrees C. How much heat is evolved per gram of fuel burned? The heat capacity of the calorimeter (hardware only...
October 26, 2011 by Aubrey

Chem >Jai
Posted by Connie on Saturday, September 10, 2011 at 10:36am. What is the amount of energy of calories to heat 8.5g of water from 15 C to 36 C? I think you take 8.5g x 21 degree C, but then I am stuck. Thank you Chem - Jai, Saturday, September 10, 2011 at 10:50am amount of ...
September 10, 2011 by Connie

Chemistry
The initial temperature of a bomb calorimeter is 28.50C. When a chemist carries out a reaction in this calorimeter, its temperature decreases to 27.45C. If the calorimeter has a mass of 1.400 kg and a specific heat of 3.52 J/(gC), how much heat is absorbed by the reaction?
July 8, 2013 by Timmy

Chemistry
This is a lab I have, but have no clue what to do. Please do out the steps so i can understand. Reactions and Data: NaOH(s)--> Na1+(aq)+ OH1-(aq) (Heat of solution of NaOH) This reaction involves adding solid NaOH to water and watching the temperature change as it dissolves...
December 31, 2011 by Carrie

Chemistry
Chlorofluocarbon was once used in air conditiones as the heat transfer liquid its normal boiling point is -30 degrees C and its enthalpy of vaporization is 16J/g. The gas and the liquid have specific heat capacities of 0.61 J/g8C and 0.97 J/g*C, respectively. How much thermal ...
November 21, 2011 by 19

physics
2. an iceskater of mass 100 kg starts to glide at 10 m/s and comes to rest. how much ice is melted? assume that half the heat generated by friction is absorbed by the ice and that the ice is at its melting point. Heat from skater* .5 = Lf*massice. 1/2 massskater*100*.5= Lf*...
April 18, 2007 by michelle

Chemistry
How much heat (in kJ) is evolved in converting 1.00 mol of steam at 145.0 degrees C to ice at -45.0 degrees C? The heat capacity of steam is 2.01 J/g* degrees C and of ice is 2.09 J/g*degrees C .
August 4, 2010 by jay

physics
The amount of heat Q needed to turn a mass m of room temperature T_1 water into steam at 100degrees C T_2 can be found using the specific heat c of water and the heat of vaporization H_v of water at 1 atmosphere of pressure. Suppose that a commercial espresso machine in a ...
November 27, 2008 by Anonymous

chemistry
given the following info for water molar heat of specific heat capacity of liquid water 4.18 j/g degrees calculate the total quanity of heat evolved when 10.0g of steam is condensed,cooled,and frozen to ice at -50 degrees
April 12, 2011 by jules

Pages: 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | Next>>

Search
Members