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Enthalpy
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Questions (315)
Use bond energies to determine the enthalpy for the following reaction
HCN(g) + H2(g) → CH3NH2(g)
4 answers
asked by
Dua
1,572 views
What is ∆H0 for this reaction?
Br2(g) → Br2(l) (∆Hf0 Br2(g) = 30.91 kJ/mol) 1.546 × 101 kJ –1.546 × 101 kJ 3.091 × 101
3 answers
asked by
Anonymous
2,103 views
How much does the molar enthalpy change when 147g of water cools from 90°C to 17.0°C? The molar heat capacity for water is
4 answers
asked by
Gino
880 views
Determine the enthalpy of 5.0 kg of water at 850 kPa.
thankyou very much!
3 answers
asked by
jay
872 views
A 0.158 g sample of magnesium metal reacts completely with 100.0 mL of 1.0 M hydrochloric acid in a coffee cup calorimeter. The
3 answers
asked by
peter
1,305 views
Using Table 9.4, calculate an approximate enthalpy (in kJ) for the reaction of 1.02 g gaseous methanol (CH3OH) in excess
3 answers
asked by
john
1,096 views
Use standard enthalpies of formation to determine ΔHorxn for:
2C2H2(g) + 5O2(g) → 4CO2(g) + 2H2O(l) Enter in kJ.
3 answers
asked by
jESS
1,093 views
N2(g) + 3H2(g) → 2NH3(g)+ 22,000 cal equals how much ΔH
4 answers
asked by
Angelica
1,642 views
Saw this one already answered, but did not understand at all...
Calculate the delta Hf of C6H12O6 (s) from the following data:
4 answers
asked by
Scooby
803 views
20cm3 of 0.500moldm-3 H2SO4 was consumed to neutralize 50cm3 of 0.400moldm-3 NaOH. The temperature of the system is increased by
1 answer
asked by
Emma
347 views
In a constant-pressure calorimeter, 75.0 mL of 0.830 M H2SO4 was added to 75.0 mL of 0.310 M NaOH. The reaction caused the
2 answers
asked by
Brianna
659 views
The standard enthalphies of formation of ozone, O3(g), and oxygen atoms are +142.70 and +249.17 kJ/mol. Calculate the reaction
3 answers
asked by
Sam
1,088 views
consider the following reaction:
2CH3OH(g) yields 2CH4(g) + O2(g) change in enthalpy= 252.8kJ Calculate the amount of heat
7 answers
asked by
Dylan
3,893 views
The value of delata h for the reaction below is -186 kJ. Calculate the heat Kj released from the reaction of 25g of Cl2
4 answers
asked by
ashely
1,536 views
2h2s g 3o2 g 2so2 g 2h2o g H=-1036KG/MOL
calculate enthalpy change in kj when 18.2 g of hydrogen sulfide are burned
4 answers
asked by
Tyler
1,455 views
CH3OH CO + 2H2 H = +90.7kJ
9. For the forward reaction, is heat being absorbed or released? 10. How much heat would be
3 answers
asked by
Anonymous
1,407 views
standard enthalpies of formation
H20(l) = -286 LiOH(s) = -487 standard enthalpies of solution for LiOH(s) to split into it's ions
3 answers
asked by
Gemma
1,519 views
Determine the enthalpy for the partial combustion of methane to carbon monoxide-
2CH4(g) + 3O2(g) = 2CO(g) + 4H2O(l) from change
3 answers
asked by
Anna
1,693 views
Calculate ΔHºrxn for the reaction
3 O2(g) ==> 2 O3(g) This is the information I am given: 2H2S(g) + SO2g) ==> 3S(s) + 2H2O(l)
5 answers
asked by
Chris
1,658 views
Calculate the standard enthalpy change for the reaction
2A+B->2C+D Use the following data: Substance A=-257kj/mol B=-413kj/mol
4 answers
asked by
tomi
2,401 views
The combustion of hydrogen–oxygen mixtures is used to produce very high temperatures (approximately 2500 °C) needed for
4 answers
asked by
tomi
2,508 views
calcute the molar enthalpy of condensation (H condensation) for ammonia when 50.0g of NH3 gas turn into a liquid at its bioling
3 answers
asked anonymously
65 views
Find the enthalpy using:
Target Reaction: 2 CO2(g) + H2O(g)→C2H2 (g) + 5/2 O2 (g) Step Reactions: C2H2 (g) + 2H2 (g) →
2 answers
asked by
Milo
104 views
20g of AgCl is dissolved in water to form Ag+ and Cl- and heat produced was -25 kj/mol. What will be the energy if 2 mole of
1 answer
asked by
Rob
223 views
Calculate ΔHrxn for the following reaction:
CaO(s)+CO2(g)→CaCO3(s) Use the following reactions and given ΔH values:
2 answers
asked by
Katie
863 views
I'm just overly confused on how to begin this especially with the fractions... please show step by step if you could. Quiz very
2 answers
asked by
Madi
576 views
Calculate the change in enthalpy of a superheated steam at 700 psia and 680°F is expanded at constant entropy to 140 psia.
1 answer
asked by
ligas
388 views
what is enthalpy of pure ethly alcohol at 1atm?
1 answer
asked by
bob
338 views
The dissolution of ammonium nitrate in water changes the temperature of water from 21C to - 1C(ice). If the molar enthalpy of
2 answers
asked by
Marc
579 views
Calculate the DHrxn of
C57H110O6 (s) + O2(g) --> CO2(g) + H2O(l) with DHf. C57H110O6(s) -390.70 O2(g) 0 CO2(g) -393.5 H2O(l)
4 answers
asked by
Anonymous
605 views
Please help me
N2O5(g) + H2O(l) --> 2HNO3(l) delta H° = -76.2 kJ H2O(l) --> H2(g) + 1/2O2(g) delta H° = 286.0 kJ 1/2N2(g) +
2 answers
asked by
Brooke
815 views
Calculate the enthalpy of the reaction of boron trioxide with steam: B2O3(s) + 3H2O(g) → 3O2(g) + B2H6(g)
Given: H2O(l) H2(g) +
3 answers
asked by
Lay
1,529 views
When 27.20mL of .5 M H2SO4 is added to 27.20 of 1M KOH in a coffee cup calorimeter at 23.5 degrees C, the temp rises to 30.17
3 answers
asked by
patrick
447 views
If the ΔH for H2O(l) → H2O(s) is -6.01 kJ, then what is the ΔH for 2H2O(s) → 2H2O(l)?
A. -12.02 kJ B. 6.01 kJ C. -6.01 kJ
1 answer
asked by
Morgan
296 views
Question: Explain whether using solid NaOH pellets rather than aqueous NaOH would alter the enthalpy. If different, would it be
2 answers
asked by
Liz
614 views
Calculate the DHof for the following reaction under standard state conditions:
2 Ag2S(s) + 2 H2O(l) ---> 4 Ag(s) + 2 H2S(g) +
1 answer
asked by
David
476 views
What is the Molar Enthalpy of Neutralization (ÄHn) in kJ/mol if 5.00 moles of HCl(aq) (acid) neutralized 5.00 moles of NaOH(aq)
1 answer
asked by
brittany sheats
408 views
Consider the gold-platinum system which has a value of delta w of -4250 J/mole;
(a) Calculate the enthalpy of mixing for a
1 answer
asked by
Anonymous
332 views
Calculate the Molar Enthalpy of Neutralization in kJ/mol of the reaction between a monoprotic acid and a monoprotic base, given
2 answers
asked by
BRANDIE
637 views
Please help me
N2O5(g) + H2O(l) --> 2HNO3(l) delta H° = -76.2 kJ H2O(l) --> H2(g) + 1/2O2(g) delta H° = 286.0 kJ 1/2N2(g) +
2 answers
asked by
Brooke
707 views
The value of ∆Ho for the reaction below is -1107 kJ:
2Ba(s) + O2(g) → 2BaO(s) How many kJ of heat are released when 15.75 g
2 answers
asked by
Jenny
1,024 views
1. The total enthalpy of 15.000kg of steam at 2250.000kPa is 34191.510kJ. Determine the dryness of the steam.
ANS = % 2.
1 answer
asked by
Danny
381 views
When sodium burns in air it produces a bright white light and heat energy
2Na + O2 2Na2O ?H = -414kJ/mol What would you expect to
3 answers
asked by
Timofey
414 views
Calculate the standard enthalpy change for the following reaction at 25 °C.
MgCl2(s)+H2O(l)-->MgO(s)+2HCl
2 answers
asked by
Orton
1,069 views
Calculate delta H fro the following equation:
H20(l, 50.0 C) yields H20(s, -10.0 C)
2 answers
asked by
Katelyn
1,017 views
If the standard enthalpy of combustion of octane, C8H18(l) is -5471 kJ/mol, calculate the enthalpy change when 1.00 kg of octane
4 answers
asked by
Sam
1,291 views
calculate the enthalpy change for the reaction n2h4(l) + 02(g) --> n2(g) + 2h20(l)
2 answers
asked by
elizabeth
1,236 views
calculate enthalpy of H for the reaction
N2H4(l) + 2H2O(l) -> N2(g) + 4H2)(l) Given the reactions N2H4(l) + O2(g) -> N2(g) +
1 answer
asked by
Rose Bud
987 views
Instant cold packs, often used to ice athletic injuries on the field, contain ammonium nitrate and water separated by a thin
3 answers
asked by
Lindsey
1,519 views
I keep finding all sorts of different enthalpy of vaporizations for bromine. I used: 254.66
So factoring 254.66/2 into my
2 answers
asked by
Crystal
553 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