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Enthalpy
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Questions (315)
16. From the standard enthalpies of formation, calculate the ƒ´Horxn for the reaction: (ƒ´Hof = -151.9 kJ/mol for C6H12.)
C6H
2 answers
asked by
nona
895 views
(a) A 102-g sample of water is placed in an insulated container and allowed to come to room temperature at 21°C. To heat the
2 answers
asked by
Lance
888 views
Consider the following reaction.
CH4(g) + 2 O2(g) CO2(g) + 2 H2O(l) ÄH = -891 kJ Calculate the enthalpy change for each of the
2 answers
asked by
Bill
881 views
Calculate the standard enthalpy change for the following reaction at 25 °C.?
2CH3 OH(g) + 3O2(g) -------- 2CO2(g) + 4H2O (g)
2 answers
asked by
Fahra
883 views
The heat evolved in the reaction of hydrobromic acid with potassium hydroxide was determined using a coffee coup calorimeter.
6 answers
asked by
Joe
876 views
Given that ?Hf for OH- ions is -229.6 kJ/mol, calculate the enthalpy of neutralization when 1 mol of a strong monoprotic acid
1 answer
asked by
antonette
895 views
A scientist measures the standard enthalpy change for the following reaction to be -53.4 kJ :
Ca(OH)2(aq) + 2 HCl(aq) CaCl2(s) +
2 answers
asked by
Austin
879 views
Calculate the standard enthalpy change for the following reaction at 25 °C.
H2O+C(graphite)(s) --> H2(g) +CO(g)
2 answers
asked by
anon
854 views
In a constant-pressure calorimeter, 75.0 mL of 0.950 M H2SO4 was added to 75.0 mL of 0.460 M NaOH. The reaction caused the
1 answer
asked by
Lyndzey
826 views
Standard enthapies of formation are not always like bond enthalpies.Explain
1 answer
asked by
Gift
794 views
∆H⁰rxn, for the reaction of Ca(s) + 2H+(aq) -> Ca2+(aq) + H2(g) is -544 kJ/mol.
∆H⁰rxn, for the reaction of CaO(s) +
5 answers
asked by
Luc
844 views
Is the molar enthalpy of combustion of pentane the same as the molar enthalpy of formation of pentane?
No. The molar enthalpy for
2 answers
asked by
B
846 views
1. The value of ΔH° for the reaction below is -6535 kJ.
_________ kJ of heat are released in the combustion of 16.0 g C6H6 (l).
3 answers
asked by
Jess
1,410 views
Given the following equation:
N2 (g) + 3H2 (g) → 2NH3 (g) ΔH = -92.6 kJ Calculate ΔH (in kJ) for the decomposition of 30.5 g
2 answers
asked by
Amanda
796 views
Calculate the Delta Hf of the OH- ion given that the Delta Hf (H2O) = -285.8 kJ mol-1.
2 answers
asked by
Jim
779 views
The following reaction has a standard enthalpy of reaction of -146.0 kJ/mol:
Cu2O(s) + 1/2 O2(g) -> 2CuO(s) The standard enthalpy
1 answer
asked by
James
794 views
What would be the change in enthalpy if you detonated 10 grams of NI3?
2 answers
asked by
Avery
800 views
I'm not sure how to calculate the ΔH°rxn
for 3 Al + 3 NH4ClO4 -> Al2O3 + AlCl3 + 3 NO + 6 H2O. I'm honestly not sure where to
2 answers
asked by
Logan
797 views
Given the following data:
4PCl5(s) �¨ P4(s) + 10Cl2(g) ƒ¢H = +1774 kJ P4(s) + 6Cl2(g) �¨ 4PCl3(l) ƒ¢H = -1278.8 kJ Find
1 answer
asked by
Hi
763 views
From the following information, calculate the standard change of enthalpy for the combustion of coal.
C + O2 -> CO2 COMPOUND HEAT
3 answers
asked by
Annabelle
768 views
A 2.50-g sample of powdered zinc is added to 100.0 mL of a 2.00-M aqueous solution of hydrobromic acid in a calorimeter. The
2 answers
asked by
HELP
735 views
The standard change in internal energy for the combustion of buckyball is -25,968 kJ/mol. What is the enthalpy of combustion?
2 answers
asked by
Joesph
737 views
A calorimeter contains 21.0 mL of water at 14.0 degreesC. When 1.90 g of X (a substance with a molar mass of 70.0 g/mol) is
1 answer
asked by
Ellen
736 views
HCl(aq) +NaOH(aq) ---> NaCl +H2O
In a coffee cup calorimeter 50 ml of 2.00M HCl was combined with 50ml of 2.05M NaOH. a) What is
1 answer
asked by
Kuu
728 views
the value of ΔH° for the reaction of 2 C6H6 (l) + 15 O2 (g) = 12 CO2 + 6H20 is -6535 kJ. how many kJ of heat are released in
1 answer
asked by
Agnes
704 views
A 0.1219-g sample of solid magnesium is burned in a bomb calorimeter that has a heat capacity of 1769 J/°C. The calorimeter
3 answers
asked by
Dani
695 views
In a constant-pressure calorimeter, 60.0 mL of 0.930 M H2SO4 was added to 60.0 mL of 0.320 M NaOH. The reaction caused the
2 answers
asked by
Amy
687 views
Calculate Delta H for the following equation: Zn(s) + 2H+(aq) = Zn2+(aq) + H2(g)
2 answers
asked by
Paula
681 views
HNO3 (g) + 4H2 (g) ---> NH3 (g) + 3H2O (g) deltaH = -637 kJ
Calculate the enthalpy change when one mole of hydrogen reacts; and
2 answers
asked by
cooper
693 views
What is the change in enthalpy when 4.00 mol of sulfer trixoide decomposes to sulfer dioxide and oxygen gas?
2SO2 + O2 ---> 2SO3
2 answers
asked by
Jessica
675 views
In a constant-pressure calorimeter, 65.0 mL of 0.330 M Ba(OH)2 was added to 65.0 mL of 0.660 M HCl. The reaction caused the
3 answers
asked by
Nate
717 views
When 24.30mL of .5 M H2SO4 is added to 24.30 of 1M KOH in a coffee cup calorimeter at 23.5 degrees C, the temp rises to 30.17
2 answers
asked by
patrick
651 views
Enthalpy
I'm given that the heat of reaction for the combustion of ethane is -1560kJ/mol. I need to figure out how much heat is
1 answer
asked by
Justin
682 views
Calculate the enthalpy change in kJ when 21.6g of H2S is burned.
2H2S(g) + 3O2(g) --> 2SO2(g) + 2H20(g) Change in H=-1036kJ/mol
1 answer
asked by
Tiffany
666 views
Calculate ÄG°373 in kJ for the following reaction at 100 °C, using data from your text.
5SO3(g) + 2NH3(g) --> 2NO(g) + 5SO2(g)
2 answers
asked by
Darali
640 views
A 1.0-g sample of MgCl2 produced a 10.00C increase in a calorimeter charged with 40.0mL of deionized water. The specific heat is
1 answer
asked by
MB
657 views
The standard enthalpy of formation of H2O (l) is -285.8 kJ/mol. Calculate DEO for the following
reaction. H2O (l) → H2 (g) +
2 answers
asked by
Mahnoor
647 views
A 10.0 g sample of liquid gallium metal, at its melting point, is added to 50.0g of water. The initital temperature of the water
1 answer
asked by
Bob
642 views
A substance has a heat of fusion of 61.5 kj/mol and a heat of deposition of 167.4 kj/mol. What is 175 heat of sublimation in
1 answer
asked by
Jim
644 views
0.5g of MG ribbon is reacted with 100ml of 1M HCL. The initial temperature of HCL is 20.4 degrees celsius. After the reaction
1 answer
asked by
Jacob
653 views
when 5.0g of KOH is added to 100mL, of water, the temperature of the solution increases by 3 degrees celsius. Assume the density
2 answers
asked by
danielle
646 views
Using the technique of the previous problem ΔE was found to be -2,000.00 kJ/mol of an unknown liquid hydrocarbon at 298 K. In
1 answer
asked by
John Handra
639 views
One mole of H2O(g) at 1.00 atm and 100 degrees C occupies a volume of 30.6 L. When one mole of H2O(g) is condensed to one mole
1 answer
asked by
Anonymous
649 views
Can someone check my answers please?
I had specific trouble with 7, 13, and 27 (I'm pretty sure my other answers are correct;
1 answer
asked by
a Canadian
637 views
Calorimeter lab. What is the change in enthalpy for magnesium after the reaction with vinegar?
vinegar is 60ml magnesium is 0.7g
2 answers
asked by
anonymous
607 views
At standard pressure, ammonia melts at 195 K and boils at 240 K. If a sample of ammonia at standard pressure is cooled from 200
3 answers
asked by
please help !
609 views
The lab we are doing is: Determining the ENTHALPY of a Chemical Reaction.
There are three reactions. Reaction 1: NaOH + HCl,
1 answer
asked by
Rina
644 views
In a three reactions system the first two reactions are endothermic with DeltaH values of 138kj and 241kj. if the final reaction
2 answers
asked by
Anonymous
630 views
3grams of ammonium chloride has been added to 20mL of water. The initial temperature of the solutionis 18.0 degrees, and once
2 answers
asked by
Adeline
621 views
Calculate the enthalpy of reaction.
D + F --> G + M using the following equations and data: G + C --> A + B ΔH = +277 kJ C + F
1 answer
asked by
Josh
591 views
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Parent Categories (15)
Chemical Bonding
Chemical Equations
Chemical Reactions
Chemical Reactions/Thermodynamics
Chemistry
Combustion Reactions
Energy
Heat Transfer
Organic Chemistry
Physical Chemistry
Reaction
Reactions
Stoichiometry
Thermochemistry
Thermodynamics