The following thermochemical equation is for the reaction of Fe(s) with HCl(aq) to form FeCl₂ (s) and H₂(g). Fe(s) + 2HCl(aq) → FeCl₂ (s) + H₂(g) AH = - 7.40 kJ When 13.8 grams of Fe(s) react with excess HCl(aq), kJ of energy are

The following thermochemical equation is for the reaction of sodium(s) with water(1) to form sodium hydroxide(aq) and hydrogen(g). 2Na(s) + 2H2O(1)- →2NaOH(aq) +H2(g) AH= -369 kJ When 5.86 grams of sodium(s) react with excess water(1), kJ of energy are

A chemist measures the energy change AH during the following reaction: 2 Fe,03(5) → 4 Fe(5)+O,(g) AH=560. kJ Use the information to answer the following question. Suppose 49.9 g of Fe,0, react. Calculate how much heat will be released or absorbed. ? Round your answer to 3 significant digits.

The following thermochemical equation is for the reaction of Fe3O4(s) with hydrogen (g) to form iron(s) and water(g). Fe3O4(s) + 4H₂(g) 3Fe(s) + 4H₂O(g) ΔΗ = 151 kJ When 81.5 grams of Fe3O4(s) react with excess hydrogen (g), kJ of energy are 0. 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.

A 9.323 g sample of metal at 99.15 °C was placed in a calorimeter containing 35.5 g of water 19.42 °C. The temperature of the water in the calorimeter rose to 22.67 °C. What is the speci heat of the metal? (s of water is 4.184 J/(g °C))

Ethyl alcohol, C2H5OH, has a specific heat of 2.40 ?? °?. Which of the following statements best describes what this means? a) It takes 1 joule of energy to increase the temperature of 1 gram of ethyl alcohol by 2.40 °C. b) It takes 1 joule of energy to increase the temperature of 2.40 grams of ethyl alcohol by 1 °C. c) It takes 2.40 joules of energy to increase the temperature of 1 gram of ethyl alcohol by 1 °C. d) It takes 2.40 joules of energy to increase the temperature of 2.40 grams of ethyl alcohol by 1 °C

How much heat (in kilojoules) is evolved when 135 g of aluminum reacts completely in the following reaction? (the molar mass of aluminum is 27.0 g/mol) 2Al + Fe203 2Fe + Al203 AH = -80 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)     H = 98.8 kJ When 44.6 grams of iron(III) oxide(s) react with excess hydrogen(g), kJ of energy are   .

Carbon disulfide reacts with chlorine according to the following reaction equation: CS2(g) + 3 Cl2(g) S2 Cl2(g) + CCI4(g) kJ A,H° = -230 mol If 15.0 g of Cl2 (70.906 g/mol) reacts with excess CS2, how much heat is transferred (include any sign needed) for this reaction? Give your answer in kJ but do not put units in the answer box. Report it to two decimal places.