The following thermochemical equation is for the reaction of iron(s) with hydrochloric acid(aq) to form iron(II)...
The following thermochemical equation is for the reaction of iron(s) with hydrochloric acid(aq) to form iron(II) chloride(s) and hydrogen(g). Fe(s) + 2HCl(aq) FeCl2(s) + H2(g) H = -7.40 kJ When 14.4 grams of iron(s) react with excess hydrochloric acid(aq), -------- kJ of energy are .-------
Homework Answers
Thermodynamics convention in chemistry.
1) if energy is given to system , it is positive.
2) if energy is released by the system,it is negative.
3) if work is done by the system,it will be negative.
4) if work is done on the system, it will be positive.
so
here ∆H is negative so energy is released by the system
and its value will be 7.40 kJ.
hence
7.40 kJ of energy are released.
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The following thermochemical equation is for the reaction of
iron(s) with hydrochloric acid(aq) to form iron(II)...
A sample of iron metal is placed in a graduated cylinder. It is noted that 10.4...
A sample of iron metal is placed in a graduated cylinder. It is noted that 10.4 mL of water is displaced by the iron. The iron is then reacted with excess hydrochloric acid to produce iron (II) chloride and hydrogen gas. Given the density for iron is 7.86 g/mL, how many grams of iron (II) chloride are produced in the reaction? Fe(s) + 2HCl(aq) - FeCl2(aq) + H2(g)
The following thermochemical equation is for the reaction of iron(III) oxide(s) with hydrogen(g) to form Fe304(s)...
The following thermochemical equation is for the reaction of iron(III) oxide(s) with hydrogen(g) to form Fe304(s) and water(g) 00'9-HV (o'H+()oz(a)H+() How many grams of Fe,Os(s) would have to react to produce 0.778 kJ of energy?
The following thermochemical equation is for the reaction of hydrogen chloride(g) with ammonia(g) to form ammonium...
The following thermochemical equation is for the reaction of hydrogen chloride(g) with ammonia(g) to form ammonium chloride(s). HCI(g) + NH3(g) NH CH) AH = -176 kJ/mol-rxn How many grams of HCI(g) would have to react to produce 51.9 kJ of energy? grams The following thermochemical equation is for the reaction of hydrogen bromide(r) with chlorine() to form hydrogen chloride) and bromine(g) 2HBr(g) + Cl2(g) +2HCl(g) + Brz(8) AH = -81.1 kJ/mol-rxn When 16.4 grams of hydrogen bromide(g) react with excess...
The following thermochemical equation is for the reaction of ammonium nitrate(s) to form dinitrogen monoxide(g) and...
The following thermochemical equation is for the reaction of ammonium nitrate(s) to form dinitrogen monoxide(g) and water(g) NH,NO3() N2O(g) + 2H2O(g) AH = -35.9 kJ How many grams of NH NO,(s) would have to react to produce 12.1 kJ of energy? grams The following thermochemical equation is for the reaction of hydrogen sulfide(g) with oxygen(g) to form water(g) and sulfur dioxide(g). 2H2S(g) + 302(g)—2H2O(g) + 2802(8) AH=-1.04x109 kJ When 9.64 grams of hydrogen sulfide(g) react with excess oxygen(g), -588.8 kJ...
The following thermochemical equation is for the reaction of iron(III) oxide(s) with hydrogen(g) to form iron(s) and wa...
The following thermochemical equation is for the reaction of iron(III) oxide(s) with hydrogen(g) to form iron(s) and water(g). Fe2O3(s) + 3H2(g)— 2Fe(s) + 3H2O(g) AH = 98.8 kJ When 62.3 grams of iron(III) oxide(s) react with excess hydrogen(g), kJ of energy are Hint: An amount of energy is expressed as a positive number. The sign of AH in the thermochemical equation indicates whether the energy is absorbed or evolved. An automobile engine provides 523 Joules of work to push the...
The following thermochemical equation is for the reaction of iron(III) oxide(s) with hydrogen(g) to form iron(s)and...
The following thermochemical equation is for the reaction of iron(III) oxide(s) with hydrogen(g) to form iron(s)and water(g). Fe2O3(s) + 3H2(g)—2Fe(s) + 3H2O(g) AHexn98.8 kJ How many grams of Fe2O3(s) would react if 36.2 kJ of energy were provided? grams Submit Answer
1. A sample of iron is reacted with excess hydrochloric acid and the hydrogen is collected...
1. A sample of iron is reacted with excess hydrochloric acid and the hydrogen is collected in a 10.L flask at 25°C, where it exerts 73 torr of pressure. What was the mass, in grams, of the iron that was dissolved in the HCl? Fe(s) + 2HCl(aq) --> FeCl2(aq) + H2(g) 2. Nitrogen monoxide reacts with oxygen to produce nitrogen dioxide in the reaction shown below. If you mix oxygen and nitrogen monoxide at the correct stoichiometric ratio, and both...
The following thermochemical equation is for the reaction of ammonium chloride(s) to form ammonia(g) and hydrogen...
The following thermochemical equation is for the reaction of ammonium chloride(s) to form ammonia(g) and hydrogen chloride(g). NH4Cl(s) NH3(g) + HCl(g) H = 176 kJ How many grams of NH4Cl(s) would be made to react if 49.8 kJ of energy were provided? _____grams
The following thermochemical equation is for the reaction of iron(III) oxide(s) with aluminum(s) to form aluminum...
The following thermochemical equation is for the reaction of iron(III) oxide(s) with aluminum(s) to form aluminum oxide(s) and iron(s). Al03(s)+ 2Fe(s) FezO3(s) + 2Al(s) AH = -852 kJ kJ of energy are When 48.5 grams of iron(III) oxide(s) react with excess aluminum(s).
The following thermochemical equation is for the reaction of carbon monoxide(g) with water(l) to form carbon...
The following thermochemical equation is for the reaction of carbon monoxide(g) with water(l) to form carbon dioxide(g) and hydrogen(g). CO(g) + H2O(l) CO2(g) + H2(g) H = 2.80 kJ When 9.83 grams of carbon monoxide(g) react with excess water(l),_______________ kJ of energy are___________ ( absorbed or evolved ) .
A sample of iron metal is placed in a graduated cylinder. It is noted that 10.4 mL of water is displaced by the iron. The iron is then reacted with excess hydrochloric acid to produce iron (II) chloride and hydrogen gas. Given the density for iron is 7.86 g/mL, how many grams of iron (II) chloride are produced in the reaction? Fe(s) + 2HCl(aq) - FeCl2(aq) + H2(g)
The following thermochemical equation is for the reaction of iron(III) oxide(s) with hydrogen(g) to form Fe304(s) and water(g) 00'9-HV (o'H+()oz(a)H+() How many grams of Fe,Os(s) would have to react to produce 0.778 kJ of energy?
The following thermochemical equation is for the reaction of hydrogen chloride(g) with ammonia(g) to form ammonium chloride(s). HCI(g) + NH3(g) NH CH) AH = -176 kJ/mol-rxn How many grams of HCI(g) would have to react to produce 51.9 kJ of energy? grams The following thermochemical equation is for the reaction of hydrogen bromide(r) with chlorine() to form hydrogen chloride) and bromine(g) 2HBr(g) + Cl2(g) +2HCl(g) + Brz(8) AH = -81.1 kJ/mol-rxn When 16.4 grams of hydrogen bromide(g) react with excess...
The following thermochemical equation is for the reaction of ammonium nitrate(s) to form dinitrogen monoxide(g) and water(g) NH,NO3() N2O(g) + 2H2O(g) AH = -35.9 kJ How many grams of NH NO,(s) would have to react to produce 12.1 kJ of energy? grams The following thermochemical equation is for the reaction of hydrogen sulfide(g) with oxygen(g) to form water(g) and sulfur dioxide(g). 2H2S(g) + 302(g)—2H2O(g) + 2802(8) AH=-1.04x109 kJ When 9.64 grams of hydrogen sulfide(g) react with excess oxygen(g), -588.8 kJ...
The following thermochemical equation is for the reaction of iron(III) oxide(s) with hydrogen(g) to form iron(s) and water(g). Fe2O3(s) + 3H2(g)— 2Fe(s) + 3H2O(g) AH = 98.8 kJ When 62.3 grams of iron(III) oxide(s) react with excess hydrogen(g), kJ of energy are Hint: An amount of energy is expressed as a positive number. The sign of AH in the thermochemical equation indicates whether the energy is absorbed or evolved. An automobile engine provides 523 Joules of work to push the...
The following thermochemical equation is for the reaction of iron(III) oxide(s) with hydrogen(g) to form iron(s)and water(g). Fe2O3(s) + 3H2(g)—2Fe(s) + 3H2O(g) AHexn98.8 kJ How many grams of Fe2O3(s) would react if 36.2 kJ of energy were provided? grams Submit Answer
The following thermochemical equation is for the reaction of iron(III) oxide(s) with aluminum(s) to form aluminum oxide(s) and iron(s). Al03(s)+ 2Fe(s) FezO3(s) + 2Al(s) AH = -852 kJ kJ of energy are When 48.5 grams of iron(III) oxide(s) react with excess aluminum(s).
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