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Enthalpy
Page 6
Questions (315)
Calculate the ƒ¢H�‹ rxn for the following reaction.
ƒ¢H�‹ f [H2S(g)] = -21 kJ/mol; ƒ¢H�‹ f [SO2(g)] = -297 kJ/mol;
1 answer
asked by
Lucinda
613 views
Use the standard enthalpies of formation for the reactants and products to solve for the ΔHrxn for the following reaction. (The
2 answers
asked by
aaatrefer
590 views
1(a) when 25.0ml of 0.500 mol.dm3 H2SO4(AQ) SOLUTION IS added to 0.025dm3 of 1.00 moldm3 KOH SOLUTION , THE TEMPERATURE OF THE
2 answers
asked by
mustafe
599 views
there's a 5.44 g sample of NH4NO3 and 150 g sample of water. So they ask for the change in enthalpy in kJ/mol. They give the
2 answers
asked by
anna
585 views
Consider the following problem:
Target: 2NOCl(g) ? N2(g)+ O2(g)+Cl2 (g) ?Hrxn= ? Steps: 1. 1/2 N2(g) + 1/2 O2(g)? NO(g) ?H= 90.3
2 answers
asked by
Anna
576 views
(a) When a 4.75-g sample of solid ammonium nitrate dissolves in 60.0 g of water in a coffee-cup calorimeter (see figure), the
2 answers
asked by
hannah
595 views
Find the molar enthalpy of vaporization for a substance, given that 3.21 mol of the subtance absorbs 28.4 kJ of energy as heat
2 answers
asked by
Analise
589 views
given C12H22O11+H2O----C6H12O6+C6H12O6 heat combustion 0f 2815.8 kj/mol what is the standard enthalpy
2 answers
asked by
yr
585 views
When 3.00 g potassium carbonate (K2CO3 ) was mixed with 20.0 mL of hydrochloric acid (HCl, 4.0M) in a calorimeter, the
2 answers
asked by
Luis
578 views
calculate delta H for N2O+4H2>N2+4H2O
2 answers
asked by
john
533 views
2 Mg(s) + O2(g)= 2 MgO(s) ÄH= -1204 kJ
How many grams of MgO are produced during an enthalpy change of 96.0 kJ?
2 answers
asked by
Vanessa
576 views
Standars enthalpy
Mg(OH)2 + H2SO4 = MgSO4 + 2 H2O
2 answers
asked by
monique
567 views
Enthalpy questions?
Given this enthalpy change MgCl₂(s)---->Mg²⁺(g) +2Cl⁻(g) ΔH∅ =+2490KJ/mol Mg2+(g)----> Mg²⁻ (aq)
2 answers
asked by
Arvind Vijayanand Dubey
536 views
Please explain.
The average bond enthalpy for the C-H bond is 412 kJ mol^-1. Which process has an enthalpy change closest to this
2 answers
asked by
Anonymous
544 views
given C12H22O11+H2O----C6H12O6+C6H12O6 heat combustion0f 2826.7kj/mol what is the standard enthalpy
2 answers
asked by
yr
556 views
The reaction between 0.055 g of calcium with an excess of water was carried out in an ice calorimeter. The volume of water in
2 answers
asked by
Raj
565 views
Using the equations and enthalpy values provided, which mathematical expression can be used to determine the unknown enthalpy
2 answers
asked by
bryan
537 views
Calculate the ÄHvap , in kJ/mol, for ethanol, given that the vapor pressure at 45.0°C is 155.0 torr. The normal boiling point
2 answers
asked by
Anonymous
552 views
Explain why the calculated value for the (1) enthalpy of combustion for propane using bond energies (bond breaking and bond
2 answers
asked by
Leah
560 views
when 2g of NaOH were dissolved in 149 g of H2o in a calorimeter at 24 degrees C the temperature of the solution went up to 29
4 answers
asked by
Dexter
524 views
Calculate the DHof for the following reaction under standard state conditions:
2 Ag2S(s) + 2 H2O(l) ---> 4 Ag(s) + 2 H2S(g) +
2 answers
asked by
Anna
540 views
If Kc = 0.450 at 40 degrees C and Kc = 0.545 at 90 C, what is the delta H for the reaction?
X <---> Y ____ kJ would this problem
2 answers
asked by
Eric
514 views
You measure Ksp for borax to be 7.8 x 10-3 and 2.9 x 10-3 at 23.6°C and 1.8°C, respectively. Calculate the standard enthalpy
2 answers
asked by
Anonymous
538 views
Compare the value you obtained from average bond energies: (260Kj) to the actual standard enthalpy of formation of gaseous
2 answers
asked by
ALISON
537 views
We did a lab about the heat hydration of sodium acetate with water. I got that the enthalpy of anhydrous sodium acetate is
2 answers
asked by
Anonymous
515 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
535 views
Calculate the work involved if a reaction with an enthalpy change of -2418 kJ is carried out in a vessel with a mobile,
2 answers
asked by
Mark
540 views
Calculate enthalpy of the reaction ethene+hydrogen gives ethane are -1410KJ,-286kJ and -1560KJ respectively at 25°c
2 answers
asked by
Anonymous
513 views
A 2.3 g sample of C5H10O is burned completely in excess oxygen to yield CO2(g) and H2O(l) at 25 C, releasing 83.42 kJ of energy.
2 answers
asked by
Katie
498 views
given the following thermochemical equations:
4B(s) + 3O2(g) -> 2B2O3(s) deltaH=-2509.1 kJ 2H2(g) + O2(g) -> 2H2O(l)
2 answers
asked by
Wethu
525 views
Given these two reactions, how do I calculate
ΔH for the third one? P4(s) + 6 Cl2(g) -> 4 PCl3(g) ΔH= -1148 kJ P4(s) + 10
3 answers
asked by
adrian
508 views
A 100.0 mL sample of 0.300 M Ca(OH)2 is mixed with 100.0 mL of 0.700 M H3PO4 in a coffee cup calorimeter. If both solutions were
1 answer
asked by
2difficult
489 views
vapor enthalpy energies kj/mol 40.66, specific heat capacities j/g degrees c s(s) 2.1, fus 6.01 enthalpy energies kj/mol 6.01
1 answer
asked by
paula
497 views
The following heats of formation are used to find the change in enthalpy for the formation of tin chloride in the following
2 answers
asked by
Mary
505 views
Methanol(MM=32.04g/mole) is sometimes used as fuel for race cars, since methanol fires are easily extinguished with water. the
3 answers
asked by
Anonymous
498 views
Calculate the value of the standard enthalpy change for each of the following reactions (standard enthalpy for Na2SO4(s) is
3 answers
asked by
Brett
493 views
The accepted value for the enthalpy for the following reaction reaction is 466.85 kJ/mol.
Mg + 2Hcl = MgCl2 + H2 Calculate the
2 answers
asked by
Serenity
500 views
In a coffee cup calorimeter, 50.00 mL of HNO3 (aq) and 50.00 mL of KOH(aq) were mixed. The temperature of the resultant solution
3 answers
asked by
Jaime
470 views
If we are given the ksp of AgCl at 14°C and 42°C,how do we find the ∆H° for the dissociation of AgCl(s)?
3 answers
asked by
Shenaya
481 views
If the ΔH for H2O(l) → H2O(s) is -6.01 kJ, then what is the ΔH for 2H2O(s) → 2H2O(l)?
A -6.01 kJ B. 6.01 kJ C. -12.02 kJ D.
2 answers
asked by
Leanne
465 views
explain whether using solid sodium hydroxide pellets rather than aqueous sodium hydroxide would alter the enthalpy
2 answers
asked by
Liz
479 views
A total of 2.00 \rm mol of a compound is allowed to react with water in a foam coffee cup and the reaction produces 115 g of
2 answers
asked by
Anonymous
479 views
Consider the reaction
2 Al2O3(s) → 4 Al(s) + 3 O2(g). ∆H = +3339.6 kJ/mol What is the change in heat when 0.455 L of
1 answer
asked by
abdullah
477 views
When 0.911 g of CaO is added to 200.0 mL of 0.500 M HCl(aq), a temperature increase of 374C is observed.
Assume the solution's
4 answers
asked by
jenivy
476 views
From the following Information, calculate the standard change of enthalpy for the combustion of coal. SHOW WORK AND BALANCED
1 answer
asked by
Chloe
464 views
I need help I can't seem to get the right answer. Please help!
1/2 H_2 (g) + 1/2 Cl_2 (g) --> HCl (g) -92.3 kJ/mol Na(s) + 1/2
1 answer
asked by
Alex
467 views
Using the following thermochemical data, what is the change in enthalpy for the following reaction?
Ca(OH)¿(aq) + HCl(aq) d
1 answer
asked by
ciara
462 views
How much heat is released when a mixture containing 12.6 g CS2 and 12.6 g Cl2 reacts by the following equation?
CS2(g) + 3 Cl2(g)
1 answer
asked by
Emily
454 views
Calculate the enthalpy change, for the process in which 40.0g of water is converted from liquid at 12.8 degrees C to vapor at
1 answer
asked by
Anonymous
457 views
How many kJ of energy are released when 2 moles of NO reacts with an excess of ozone O3? How many kJ of energy are released when
1 answer
asked by
Anonymous
445 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