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October 26, 2014

Search: Using enthalpies of formation in Appendix C, calculate delta H for this reaction. 2al(s)+Fe2o3(s)-->al2o3(s)+2fe(s)

Number of results: 45,558

Chemistry
Calculate the enthalpy change (delta H) in kJ for the following reaction. 2Al(s) + Fe2O3 (s) ==> 2 Fe(s) + Al2O3(s) use enthalpy changes for the combustion of aluminum and iron. 2Al(s) + 3/2 O2(g) ==> Al2O3(s) Delta H: -1669.8 kJ 2Fe(s) + 3/2 O2(g) ==> Fe2O3 (s) Delta...
May 23, 2010 by Kim

Chemistry
Calculate the enthalpy change (delta H) in kJ for the following reaction. 2Al(s) + Fe2O3 (s) ==> 2 Fe(s) + Al2O3(s) use enthalpy changes for the combustion of aluminum and iron. 2Al(s) + 3/2 O2(g) ==> Al2O3(s) Delta H: -1669.8 kJ 2Fe(s) + 3/2 O2(g) ==> Fe2O3 (s) Delta...
May 23, 2010 by Kim

Chemistry
Using standard enthalpies information, calculate the standard enthalpy change for this reaction: a) (thermite reaction) 2Al(s) + Fe2O3(s) = Al2O3(s) + 2Fe(s) b) Mg(OH)2(s) = MgO(s) + H2O(I) c) N2O4(g) + 4H2(g) = N2(g) + 4H2O(g) d) SiCl4(I) + 2H2O(I) = SiO2(s) + 4HCI(g)
July 3, 2014 by Brett

Chemistry
Using standard enthalpies information, calculate the standard enthalpy change for this reaction. a)(thermite reaction) 2Al(s) + Fe2O3(s) = Al2O3(s) + 2Fe(s) b)Mg(OH)2(s) = MgO(s) + H2O(I) c)N2O4(g) + 4H2(g) = N2(g) + 4H2O(g) d)SiCl4(I) + 2H2O(I) = SiO2(s) + 4HCI(g)
July 3, 2014 by Dan

Chemistry :(
Given that: 2Al(s)+(3/2)O2(g)--->Al2O3(s) change in H(rxn)= -1601 kJ/mol 2Fe(s)+(3/2)O2(g)--->Fe2O3(s) change in H(rxn)= -821 kJ/mol Calculate the standard enthalpy change for the following reaction: 2Al(s)+Fe2O3(s)--->2Fe(s)+Al2O3(s) _______kJ PLEASE EXPLAIN IM SOOO ...
October 31, 2010 by Lucy

Chemistry-College
Given that: 2Al(s)+(3/2)O2(g)--->Al2O3(s) change in H(rxn)= -1601 kJ/mol 2Fe(s)+(3/2)O2(g)--->Fe2O3(s) change in H(rxn)= -821 kJ/mol Calculate the standard enthalpy change for the following reaction: 2Al(s)+Fe2O3(s)--->2Fe(s)+Al2O3(s) _______kJ
October 31, 2010 by Lucy

Chemistry (Enthalpy)-College
Given that: 2Al(s)+(3/2)O2(g)--->Al2O3(s) change in H(rxn)= -1601 kJ/mol 2Fe(s)+(3/2)O2(g)--->Fe2O3(s) change in H(rxn)= -821 kJ/mol Calculate the standard enthalpy change for the following reaction: 2Al(s)+Fe2O3(s)--->2Fe(s)+Al2O3(s) _______kJ
October 31, 2010 by Lucy

Chemistry
Fe2O3(s) + 2Al(s)-> 2Fe(l) + Al2O3(s) What is the theoretical yield of iron if we begin the reaction with 10.5 g of Al (assume an excess of Fe2O3)
February 16, 2014 by tgt

chemistry
the thermite reaction was previously used to weld the rails of railroad tracks together. the reaction is: Fe2O3(s)+ 2Al(s)--> 2Fe(l)+ Al2O3(s) (2Fe and 3 oxygen) (2Al and 3 oxygen) what masses of iron(III) oxie and aluminum must be used to produce 15.0g of liquid iron? what...
January 12, 2012 by travis

chemistry
what are the phases of all the reactants and products in the reaction 2Al + Fe2O3--->2Fe + Al2O3?
October 5, 2011 by bethany

Chemistry
Using a table how would you know what elements were oxidized, reduced, or neither? 2Al + Fe2O3 = 2Fe + Al2O3
March 30, 2011 by Sethh

Chemistry - Please check
d) 2Al(s) + Fe2O3(s)  2Fe(l) + Al2O3(s) Oxidation 2Al(s)  2Al+ + 2e- Reduction Fe23+ + 3e-  2Fe(l) Oxidation numbers for chlorine HCl = -1 MnO2(s)= +4 KMnO4(s)= +7 Oxidation numbers for manganese Mn(s)= ? MnCl2(s)= +7 Mn2+(aq)= ? MnO4- =? And then SO4 ...
February 13, 2008 by Alex

chemistry (grade 12)
how much heat will be liberated if 37.8 g of Fe2O3 is allowed to react with 18.7 g of aluminum. Fe2O3(s) + 2Al(s)--> Al2O3(s) + 2Fe(s) + 851.5kJ
February 15, 2012 by Rose Bud

Honors Chemistry
Equation: Fe2O3 + 2Al ---> 2Fe + Al2O3. How many grams of Fe2O3 react with excess Al to make 475g Fe? Can you show me step by step how to do it? My book says the answer is 679g Fe2O3.
February 23, 2010 by Anan

Honors Chemistry
Fe2O3 + 2Al --> 2Fe + Al2O3 How many grams of Fe will form when 97.6g Al2O3 form? Please & Thank you
February 23, 2010 by Ana

Chemistry
Please help! I don't understand these questions at all. :( Fe2O3(s) + 2Al(s) -> Al2O3(s) + 2Fe(l) If 0.50 mol of Fe is produced in 10 secs, what is the rate of consumption of Fe2O3 in mol/s? A. 5.0 x 10^-2 mol/s B. 2.5 x 10^-2 mol/s C. 1.0 x 10^-1mol/s D. 5.0 mol/s Thank you!
October 16, 2014 by Nancy

chemistry
Some spacecrafts use hydrazine (N2H4) as fuel and is burned according to the following reaction: N2H4(l)+N2O4(g)=>2 N2O(g)+2 H2O(g) Calculate the DHrxn for this reaction using the standard enthalpies of formation from Appendix IIB. Calculate your answer to 4 sig figs
March 4, 2013 by Brandi

chemistry
use standard enthalpies of formation to calculate delta Hrxn for the following reaction. 2H2S(g)+3O2(g)-->2H2O(l)+2SO2(g) express the answer using four significant figures Delta Hrxn = ? kJ
October 25, 2011 by jen

chemistry
use standard enthalpies of formation to calculate delta Hrxn for the following reaction. 2H2S(g)+3O2(g)-->2H2O(l)+2SO2(g) express the answer using four significant figures Delta Hrxn = ? kJ
October 25, 2011 by jen

Chemistry
The net reaction in a voltaic cell with Ecell= +.726V 2Fe^3+(aq) + 3Zn(s) --> 2Fe(s) + 3Zn^2+(aq) What is the delta G for this reaction at 25C I tries using this equation: delta G = -nFEcell = -n(90485)(.726) However, I don't know how to calculate n in this. I ...
August 9, 2009 by Sara

College Chem
Calculate the enthalpy of reaction from the standard enthalpies of formation of the reactant and product molecules. 2C2H6+7O2-->4CO2+6H20 I am using the back of my book for the standard enthalpies of formation, but cannot seem to find the HoF for C2H6?
May 8, 2011 by Betsie

Chemistry-Enthalpies of formation
"Synthesis gas" is a mixture of carbon monoxide and hydrogen that is used to synthesize a variety of organic compounds. One reaction for producing synthesis gas is 3CH4 + 2H2O + CO2 = 4CO + 8H2 Using enthalpies of formation, calculate the enthalpy change for this reaction in ...
April 13, 2009 by Brigette

AP chemistry
Given the standard molar entropies measured at 25 C and 1 ATM pressure calculate delta S for the reaction 2al + 3 mg0 ---> 3mg + al2o3
October 14, 2012 by Tilly

chemistry
when aluminum metal reacts with iron (III) oxide to form aluminum oxide and iron metal, 429.6 kJ of heat are given off for each mole of aluminum metal consumed, under constant pressure and standard conditions. What is the correct value for the standard enthalpy of reaction in ...
December 2, 2008 by sylvia

chemistry
Calculate the heat of formationof benzene if the heat of combustion of benzene is 3260 kj/mol, given the following enthalpies of formation of the product. enthalpies of formation for O2= 0k (element) enthalpies of formation CO2 = -394kj/mol enthalpies of formation H2O= -285 kJ...
July 18, 2011 by priya

CHEMISTRY
In each reaction, calculate the moles of product (in parentheses) when 3.00 moles of each reactant is used. A: 4Li+O2 = 2Li2O (Li2O) B: Fe2O3+3H2 = 2Fe+3H2O (Fe) C: Al2S3+6H2O = 2Al(OH)3+3H2S (H2S) Please show work, Thanks
October 31, 2012 by Boo Boo

chemistry
Thermite mixtures are used for certain types of weldings and the thermite reaction is highly exothermic. Given delta H= -852 KJ/mol, 1 mole of granular Fe2O3 and 2 moles of granular aluminum are mixed at room temperature and the reaction is initiated. the liberated heat is ...
July 27, 2013 by sharmaine

chemistry
Thermite mixtures are used for certain types of weldings and the thermite reaction is highly exothermic. Given delta H= -852 KJ/mol, 1 mole of granular Fe2O3 and 2 moles of granular aluminum are mixed at room temperature and the reaction is initiated. the liberated heat is ...
July 27, 2013 by sharmaine

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

Chemistry
The balanced equation for the decomposition of sodium bicarbonate is 2 NaHCO3 (s) --> Na2CO3 (s) + H2O (g) + CO2 (g)delta H 129.2. Using the enthalpies of formation, calculate the enthalpy of formation of sodium bicarbonate.
April 30, 2013 by Laura

chemistry
Given: *Fe2O3(s)+3CO(s)-->2Fe(s)+3CO2(g)(delta h is -23kJ) *3Fe2O3(s)+CO(g)-->2Fe3O4(s)+CO2(g)(delta h is -39kJ) *Fe3O4(s)+CO(g)-->3FeO(s)+CO2 (delta h is 18kJ) Desired:FeO(s)+CO(g)-->Fe(s)+CO2(g) find delta h for the desired reaction. which reactions do i reverse ...
March 26, 2008 by tanisha

Chemistry
Use enthalpies of formation from the textbook to calculate the standard enthalpy of the reaction for the following methane- generating reaction of methanogenic bacteria given delta Hf of CH3NH2=-22.97kJ/mol: 4CH2NH2+2H2O----->3CH4+CO2+4NH3
November 6, 2011 by Kay

chemistry
Which of the following equations represents a reaction for which the delta H can be called a standard enthalpy of formation, delta Hf? a) FeO(s) + CO2(g) -> FeCO3(s) b) 1/2 N2(g) + 2 O(g) -> NO2(g) c) 2 Na(s) + Cl2(g) -> 2 NaCl(s) d) Ba(s) + N2(g) + 3 O2(g) -> Ba(...
January 23, 2012 by timmy

Chemistry
Caluclate the delta H for this reaction using standard enthalpies of formation. (The standard enthalpy of formation of liquid pentane is -146.8kJ/mol. Balanced equation balanced equation: C5H12(l)+8O2(g)-->5CO2+6H2O(g) CO2=393.5 H2O=40.7
December 4, 2010 by Ashley

Chemistry
The standard enthalpies of formation of ions in aqueous solutions are obtained by arbitrarily assigning a value of zero to H ions;that is, delta H(f) [H+(aq)]=0 A.for this reaction: calculate delta H(f) for the Cl- ions. HCl(g) ==H2O==>H+(aq)+Cl-(aq) delta H= -74.9 kJ/mol (...
October 31, 2010 by Kristin

Chemistry- college
The standard enthalpies of formation of ions in aqueous solutions are obtained by arbitrarily assigning a value of zero to H ions;that is, delta H(f) [H+(aq)]=0 A.for this reaction: calculate delta H(f) for the Cl- ions. HCl(g) ==H2O==>H+(aq)+Cl-(aq) delta H= -74.9 kJ/mol (...
November 1, 2010 by Willy

Chemistry
Calculate the amount of heat released in the complete combustion of 8.17 grams of Al to from Al2O3 at 25 celcius and 1 atm. The delta enthalphy change in the heat of formation for Al2O3 = 1676 KJ/mol 4Al(s) + 3O2(g) --> 2Al2O3(s)
April 16, 2012 by Philip

Chemistry
I want to know the enthalpy change for this reaction which occurs in a blast furnace: Fe2O3(s) + 3C(s) --> 2Fe(l) + 3CO(g) You will need the heat of formation for CO, and ironIIIoxide, and the heatofmelting for iron. I suspect you have some temperature in mind also which ...
April 15, 2007 by Alice

chemistry
Balance the following equations? Fe2O3 + 3H2 → 2Fe + 3H2O 4NH3 + 5O2 → 4NO + 6H2O 2Al + 6HAsO3 → 3H2 + 2Al(AsO3)3
February 6, 2009 by kate

chemistry
Calculate the number of moles of Al2O3 that are produced when 0.6 mol of Fe is produced in the following reaction. 2Al(s) + 3Fe(s)-- 3Fe(s) + Al2O3(s)
December 9, 2012 by Chan

science, chemistry
2Al(s)+ 3Cl2(g)=2AlCl3(s) For the above reaction calculate: A) delta H, then state whether the reaction is endothermic or exothermic B) delta s, then whether the reaction becomes more or less disorder. C) delta G, the state whether the reaction is spontaneous or non-spontaneous
May 7, 2012 by Bryan

Chemistry
Hydrogen and methanol (CH3OH) have both been proposed as alternatives to hydrocarbon fuels. a) Write balanced chemical equations for the complete combustion of hydrogen and the complete combustion of gaseous methanol. Combustion reaction for hydrogen: 2H2(g)+ O2 --> 2H2O(l...
November 4, 2010 by Jarrod

Chemistry
2)Which of the following equations represents a reaction for which the delta H can be called a standard enthalpy of formation, delta Hf? a) FeO(s) + CO2(g) -> FeCO3(s) b) 1/2 N2(g) + 2 O(g) -> NO2(g) c) 2 Na(s) + Cl2(g) -> 2 NaCl(s) d) Ba(s) + N2(g) + 3 O2(g) -> Ba...
January 21, 2012 by Hannah

Chemistry
for the reaction of hydrogen with iodine H2(g) + I2(g) --> 2HI(g) relate the rate of disappearance of hydrogen gas to the rate of formation of hydrogen iodide. and my answer is: rate formation of HI= delta [HI]/delta t and the rate of reaction of I2 = delta [I2]/ delta t to...
February 17, 2008 by Lauren

CHEMISTRY
Fe2O3 + 3CO= 2Fe + 3CO2, SUPPOSE THAT 1.64kg OF Fe ARE OBTAINED FROM A 2.62kg SAMPLE OF Fe2O3(ORE). ASSUMING THE REACTION IS COMPLETE, WHAT IS THE PERCENT PURITY OF THE Fe2O3 IN THE ORIGINAL SAMPLE?
April 17, 2011 by BECKY

College Chem.
How much energy is evolved during the reaction of 48.7 g of Al, according to the reaction below? Assume that there is excess Fe2O3. Fe2O3(s) + 2 Al(s) → Al2O3(s) + 2 Fe(s), ΔHrxn = -852 kJ
September 1, 2010 by Brandee

College Chem.
How much energy is evolved during the reaction of 48.7 g of Al, according to the reaction below? Assume that there is excess Fe2O3. Fe2O3(s) + 2 Al(s) → Al2O3(s) + 2 Fe(s), ΔHrxn = -852 kJ
September 1, 2010 by Brandee

chemistry
Fe2O3+ 3CO=2Fe+3Co2, suppose that 1.64kg of Fe are obtained from a 2.62kg sample of Fe2O3 (ore). assuming that the reaction goes to completion, what is the percent purity of the Fe2O3 in the original sample.
April 19, 2011 by becky

chemistry
Use standard enthalpies of formation to calculate ΔHrxn for each reaction. (See the appendix. Enter your answer to the tenth place.) (a) 2 H2S(g) + 3 O2(g) 2 H2O(l) + 2 SO2(g) (b) N2O4(g) + 4 H2(g) N2(g) + 4 H2O(g) (c) SO2(g) + 1/2 O2(g) SO3(g) These are so easy, but no ...
November 17, 2012 by DeeDee

Chemistry
A sample weighing 3.064 g is a mixture of Fe2O3 (molar mass = 159.69) and Al2O3 (molar mass = 101.96). When heat and a stream of H2 gas is applied to the sample, the Fe2O3 reacts to form metallic Fe and H2O(g). The Al2O3 does not react. If the sample residue weighs 2.407 g, ...
October 29, 2012 by Chris

chemistry
Consider the reaction 3CH4(g)= C3H8(g)+ 2H2(g). Using data from Appendix C in the textbook, calculate delta G at 298 K.
February 14, 2012 by Anonymous

chemistry
For the reaction shown below complete the following calculations. H2(g) + C2H4(g) --> C2H6(g) (a) Estimate the enthalpy of reaction using the bond energy values in Table 9.4. (b) Calculate the enthalpy of reaction, using standard enthalpies of formation. (ΔHf for H2, ...
October 27, 2008 by hannah

Chemistry
Propane (C3H8) burns according to the following balanced equation: C3H8(g)+5O2(g)→3CO2(g)+4H2O(g) Calculate ΔH∘rxn for this reaction using standard enthalpies of formation. (The standard enthalpy of formation of gaseous propane is -103.9 kJ/mol.)
April 6, 2014 by Anonymous

Chemistry(Please check)
1)A piece of metal with a mass of 5.50 grams changed in temperature from 25 to 55 degrees celsius when 21.3 joules was absorbed. What is the specific heat of the metal? a)0.256 b)0.129 c)3.91 d) 7.75 e)0.710 Jg^-1 C^-1 I chose 7.75 because I did 5.50/21.3 and then multiplied ...
January 20, 2012 by Hannah

Chemistry!
When 2.5g of NaOH were dissolved in 49.0g water in a calorimeter at 24.0 C, the temperature of the solution went up to 37.1 C. a. Is the solution reaction exothermic? Why? The temperature or the water went from 24.0 to 37.1 which is an increase. If the solution of NaOH in ...
December 4, 2006 by DrBob222

chemistry
Calculate enthalpy change of reaction for the combustion of gaseous ethanol. C2H5OH + 3O2 >> CO2 + 3H2O. Using standard molar enthalpies of formation. C2H5OH -235.3 ( it's negative sign) CO2 -393.5 H2O -241.8 (1) Calculate the enthalpy change of reaction per mole of ...
April 20, 2010 by Alex

Chemistry
Use the data in the table to calculate the Delta G0 of the following reaction at 298k: Al2O3 ---> Delta G fusion -1582.3 HCl----> -131.2 AlCl3 -----628.8 H2O --- -237.1 The equation is Al2O3 + 6HCl ---> 2 AlCl3 + 3H2O products - reactants? [2(-628.8)+3(-237.1) - (-...
May 1, 2013 by ramire2

chemistry*
Over the years, the thermite reaction has been used for welding railroad rails, in incendiary bombs, and to ignite solid-fuel rocket motors. The reaction is given below. Fe2O3(s) + 2 Al(s) -->2 Fe(l) + Al2O3(s) What masses of iron(III) oxide and aluminum must be used to ...
April 25, 2010 by Anonymous

chemistry
Fe2O3 + 3CO --> 2Fe + 3CO2 a 16.2 L sample of CO at 1.5 atm and 200 C is combind with 15.39 g Fe2O3. how many moles of CO are available for the reaction? what is the limiting reacta? How many moles of Fe are formed?
March 10, 2010 by hilde

Chemistry
37.5 g of Fe2O3 is added to 240 cm^3 of HCl. The reaction occurs according to equation : 6HCl + Fe2O3 -> 2FeCl + 3H2O At the end of reaction, 5.5 g of Fe2O3 remain unreacted. Find A) calculate the molarity of HCl used B) calculate the mass of FeCl3 produced
June 28, 2014 by Lilo

Chemistry
Given 2Al(s) + 3/2O2(g) → Al2O3(s), ΔHf = -1,670 kJ/mol for Al2O3 (s). Determine ΔH for the reaction 2Al2O3(s) → 4Al(s) + 3O2(g).
May 5, 2014 by Chris

Chemistry II
C4H4 (g) + 2 H2 (g) --> C4H8 (g) Combustion reactions involve reacting a substance with oxygen. When compounds containing carbon and hydrogen are combusted, carbon dioxide and water are the products. Using the enthalpies of combustion for C4H4 (-2341 kJ/mol), C4H8 (-2755 kJ...
May 20, 2007 by Jayd

chemistry
6Na+Fe2O3=3Na2O+2Fe if Interact 100g of Na with 100g of Fe2O3,Calculate: - The resulting mass of iron?
February 4, 2014 by Anonymous

Chemistry
Why do we put a minus sing in front of the bond enthalpies of the bonds that are being formed? And why are the enthalpies of formation negative in general? I also don't understand why we subtract the enthalpy of formation of the reactants from the enthalpy of formation of the ...
April 3, 2010 by Anna

Chemistry
Calculate the enthalpy change of formation for the following reactions using Hess's law, and the enthalpies of formation given in Figure 4: b) MgO +2HCl --> MgCl2 +H2O c)NaOH+ HCl -->NaCl +H20 Figure4: the given enthalpies of formation compound values are: Mg(OH)2 is ...
January 30, 2014 by BOB

chemistry
ammonium nitrate decomposes to N2O and water at temperatures between 250 C and 300 C. Write a balanced chemical reaction describing the decomposition of ammonium nitrate, and calculate the standard heat of reaction using the appropriate enthalpies of formation. Please include ...
March 28, 2012 by Tori

Chemistry
in the reaction of aluminium and iron (III) oxide to form iron and aluminium oxide, H-850 kJ. how many grams of aluminium oxide are formed when 350 kJ are released? 2Al(s) + Fe2O3 -- Fe(s) + Al2O3(s) H=-850 kJ
May 24, 2012 by Fiona

Chemistry
Calculate the enthalpy of combustion for acetic acid using standard enthalpies of formation.
November 12, 2012 by Diana

Chemistry
For the reaction described by the chemical equation: 3C2H2(g) -> C6H6(l) .. Delta H rxn = -633.1 kJ/mol a) Calculate the value of Delta S rxn at 25.0 C... b) Calculate Delta G rxn... c) In which direction is the reaction, as written, spontaneous at 25 C and 1 bar pressure...
March 9, 2012 by Katherine

Chemistry
Electron Transfer Theory Write an label the oxidation and reduction half-reaction equations. a) Ni(s) + Cu(NO3)2(aq) -> Cu(s)+ Ni(No3)2(aq) oxidation - Ni(s) -> Ni2+(aq) + 2e- reduction - Cu2+(aq) + 2e- -> Cu(s) b) Pb(s) + Cu(NO3)2(aq) -> Cu(s) + Pb(NO3)2(aq) ...
February 10, 2008 by Alex

Chemistry
Electron Transfer Theory Write an label the oxidation and reduction half-reaction equations. a) Ni(s) + Cu(NO3)2(aq) -> Cu(s)+ Ni(No3)2(aq) oxidation - Ni(s) -> Ni2+(aq) + 2e- reduction - Cu2+(aq) + 2e- -> Cu(s) b) Pb(s) + Cu(NO3)2(aq) -> Cu(s) + Pb(NO3)2(aq) ...
February 10, 2008 by Alex

Chemistry
How many grams Al and how many grams Cr2O3 should be taken to gain 10g Cr.How many grams of Al2O3 will be spent? Reaction: Cr2O3 + 2Al -> 2Cr + Al2O3
January 20, 2013 by GeneralChem

chemistry
A 114g sample of sucrose undergoes incomplete combustion according to the reaction C12H22011 + 5O2 ---> 4C + 6CO + 2CO2 + 11H2O using the chart of enthalpies of formation determine the enthalpy released by the sample i think that it is a simple enthalpy problem but in the ...
July 25, 2010 by rick

physical chemistry
1.) Calculate delta rH for the freezing of water at one bar and -10 degrees C. The heat capacities are H2O(s)=36.9 JK-1mol-1 and H2O(l)=74.5JK-1mol-1. delta H for freezing of water at 0 degree C is -6602Jmol-1 (assume C is independent of temperature). 2.) Assume the hot brick ...
February 21, 2012 by nicole

Analytical chemistry
The iron in a 0.6656 g ore sample was reduced quantitatively to the +2 state and then titrated with 26.753 g of KMnO4 solution. Calculate the percent Fe2O3 in the sample. the mass i get for fe2o3 is too big, but i don't know how else to do this problem, someone please help :S ...
August 3, 2013 by Gloria

Chemistry
Given 2Al2O3 (s) --> 4Al(s) + 3O2 (g) (standard enthalpy change= 3351.4 kJ) a) What is the heat of formation of aluminum oxide? How do I find heat of formation from standard enthalpy change? I know how to do it when I'm given enthalpy, but they aren't the same thing- ...
January 31, 2007 by Chris

Chemistry
Mg(s) + 2HCl(aq) -> MgCl2(aq) + H2(g) delta H1? MgO(s) + 2HCl(aq) ->MgCl2(aq) + H2O(l) delta H2? To make these equations add up to the formation reaction of MgO, you will need to include the following: H2(g) + 1/2O2(l) delta H =-241.8 kJ Using Hess's Law and manipulating...
February 14, 2012 by Hannah

chemistry
1) All of the following are oxidation-reduction reactions except (a) 2Al(s) + Fe2O3(s) ---> A12O3(s) + 2Fe(s) (b) (NH4)2Cr2O7(s) ---> Cr2O3(s) + N2(g) + H2O(1) (c) Cu(s) + 2H2SO4(aq) ---> CuSO4(aq) + SO2(g) + 2H2O(1) (d) Hg(NO3)2 + 4KI ---> K2HgI4(aq) + 2 KNO3(aq...
April 10, 2010 by write2khin

chemistry
If heat of reaction, Ca(s) + 2H+(aq) Ca2+(aq) + H2(g) , is - 544 kJ/mol, heat of reaction, CaO(s) + 2H+(aq) Ca2+(aq) + H2O(l) , is -192 kJ/mol. and heat of formation of water is -286, what is heat of CaO? Ca(s) etc is equation 1. CaO + 2H^+ etc is equation 2. H2 + 1/2 O2 ==>...
February 10, 2007 by nicholas

chemistry check
please check Write the balanced equation, with the enthalpy component, for the rusting process, given that Hf for iron and oxygen is 0 and Hf for ferric oxide is -826 kJ/mol. 4 Fe (s) + 3 O2 (g) --------> 2 Fe2O3 (s) You need to add the heat one of three ways. 4 Fe (s) + 3 ...
February 8, 2007 by key

Chemistry
Using enthalpies of formation, calculate the quantity of heat produced when 14.0 g of propane is completely combusted in air under standard conditions.
October 14, 2011 by John

Chemistry
Which element is oxidized in this reaction? Fe2O3+ 3CO-(arrow)2Fe+3CO2
October 5, 2009 by Rose

Chem
Calculate delta H for the formation of one mole of N2O5 from the elements at 25 degrees C using the following data. 2H2 + O2 - 2H2O delta H = -571.6 kJ N2O5 + H2O - 2HNO3 deltaH = -73.7 kJ 1/2N2 + 3/2O2 + 1/2H2 - HNO3 delta H = -174.1 kJ
April 8, 2010 by Anonymous

Chem
Calculate the number of grams of Fe formed when 0.300kg of Fe2O3 reacts. Equation: Fe2O3+CO-->Fe+CO2 converted .300kg to 300g Balanced Fe2O3+3CO-->2Fe+3CO2 So I started by trying this: 300gFe2O3(1molFe2O3/159.687gFe2O3)...and then I don't know where I would go from there...
September 16, 2012 by Ezra

Chemistry
Iron metal is formed during the reduction of iron(III) oxide: Fe2O3 + 3CO 2Fe + 3CO2 When 24.3 kg of Fe2O3 react with 14.6 kg of CO and 7.8 kg of Fe are recovered, what is the percent yield for the reaction? Pls.. help I am having a hard time finding the answer. The wordings ...
April 13, 2011 by komal

Chemistry 104
Calculate Eo (reduction potential) for the following balanced reaction. NiO2 + 2H2O + 2Fe(OH)2 Ni(OH)2 + 2Fe(OH)3
May 3, 2013 by Sophie

chemistry
if enthalpies for formation of p4o10, h2o and h3po4 are -2984, -285.9 and -1279 respectively calculate the enthalpy change using hess's law
July 4, 2012 by mala

Chenmistry
Fe2O3 + 3C = 2Fe + 3CO How many grams of C are required to react with 2.50 moles of Fe2O3 ?
April 1, 2013 by Marcie

Chemistry 104 PLEASE HELP ME!!
Calculate Eo (reduction potential) for the following balanced reaction. NiO2 + 2H2O + 2Fe(OH)2 Ni(OH)2 + 2Fe(OH)3
May 3, 2013 by Sophie

Chemistry
Given the Data: N2(g) + O2g) = 2NO(g) delta H = 180.7kj, 2NO(g) + O2(g) = 2NO2(g) delta H = 0113.1kj, 2N2O(g) = 1N2(g) + O2(g) delta H = -163.2kj. Using Hesss Law calculate delta H for the reaction: N2O(g) + NO2(g) = 3NO(g)
July 3, 2014 by Brett

Chemistry
Given the Data: N2(g) + O2g) = 2NO(g) delta H = 180.7kj, 2NO(g) + O2(g) = 2NO2(g) delta H = 0113.1kj, 2N2O(g) = 1N2(g) + O2(g) delta H = -163.2kj. Using Hesss Law calculate delta H for the reaction: N2O(g) + NO2(g) = 3NO(g)
July 3, 2014 by Dan

chemistry
I still do not understand how to figure out this problem yet? 6FeO3----->4Fe304+02 DELTA H=+ 392kj If 2.83 g of Fe2O3 decomposed according to the above reaction , how many kj of heat would be exchanged with the enviroment? chem - DrBob222, Thursday, October 15, 2009 at 11:...
October 15, 2009 by lauren

chemistry
how many grams of CO are needed to react with an excess of Fe2O3 to produce 201.1 g Fe? Fe2o3(s) + 3CO(g) -> 3CO2(g) + 2Fe(s)
April 28, 2013 by daniele

Chemistry: Check my answers?
Write yes or no below if the chemical equation is balanced or not. 1. 2H2 + O2 ---> 2H2O 2. S8 + 12O2 ---> 8SO3 3. HgO ---> Hg + O2 4. Zn + HCl ---> ZnCl2 + H2 5. 2Na + 2H2O ---> 2NaOH + H2 6. 2Al + 3FeO ---> Al2O3 + 3Fe 7. 4Si2H3 + 11O2 ---> 8SiO2 + ...
March 24, 2014 by Anonymous

chemistry
how many grams of CO are needed to react with an excess of Fe2O3 to produce 209.7gFe? Fe2O3(s) + 3CO(g) => 3CO2(g) + 2Fe(s)
January 31, 2008 by Theodore

Chemistry
How many grams of CO are needed to react with an excess of Fe2O3 to produce 233.4 gFe? Fe2O3 (s) + 3CO (g) --> 3CO2 (g) + 2Fe (s)
December 11, 2011 by :)

chemistry
how many grams of CO are needed to react with an excess of Fe2O3 to produce 209.7gFe? Fe2O3(s) + 3CO(g) => 3CO2(g) + 2Fe(s)
March 29, 2012 by help please

Chemistry
How many grams of CO are needed to react with an excess of Fe2O3 to produce 209.7gFe? Fe2O3(s) + 3CO(g) => 3CO2(g) + 2Fe(s)
May 17, 2012 by Shelly

Chemistry
delta G reaction = delta G products - delta G reactants. Hydrogen peroxide is used as a bleachin agent, a disinfectant and medicinally as a topical antibacterial agent. Hydrogen peroxide decomposes according to the reacton 2H^2O^2(l)-->2H^2O(l)+o^2(g) A. Given the standard ...
May 15, 2007 by DrBob222

stoichiometry
1.how many mole, Fe can be made from Fe2O3 by the use of 20 moles of carbon monoxide, CO in the following reaction? Fe2O3+ 3CO = 2Fe+ 3CO2 2. How manhy moles of H2O are produced when 2.75 moles of O2 are consumed if burning methyl alcohol, CH3OH, according to the following ...
April 6, 2013 by jace

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