The overall reaction in a commercial heat pack can be represented as 4Fe(s) +30₂(g) →2Fe₂O3(s) AH = −1652 kJ a. How much heat is released when 4.80 moles of iron are reacted with excess O₂? Heat = kJ b. How much heat is released when 1.00 mole of Fe2O3 is produced? Heat = kJ c. How much heat is released when 1.40 g iron is reacted with excess O2? Heat = kJ d. How much heat is released when 11.4 g Fe and 1.90 g O2 are reacted? Heat = kJ

Which of the following reactions is exothermic? C2H4(g) + O2(g) → 2C(s) + 2H2O(g) AH = 469.2 kJ O N204(g) + 57.6 kJ → 2NO2(g) C2H4(g) + 302(g) → 2CO2(g) + 2H2O(g) > AH = 1322.9 kJ PCI3(g) + Cl2(g)→ PCI5(g) + 92.5 kJ

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The flame in a torch used to cut metal is produced by burning acetylene (C2H2)(26.04 g/mol) in pure oxygen. Assuming the combustion of 1 mole of acetylene releases 1251 kJ of heat, what mass of acetylene is needed to cut through a piece of steel if the process requires 22.5  × 104 kJ of heat?                                            2 C2H2(g) + 5 O2(g) → 4 CO2(g) + 2 H2O(g) ΔH = –2502 kJ

When 3.8 g A are reacted with 8.5 g D,  according to the balanced chemical equation below, 33 kJ of energy are released.  Please calculate the enthalpy for this reaction when 3 moles of G are produced.  2A + 3D = 2Z + 3G  given molar masses: A = 141.8 g/mole D = 63.996 g/ mole Z = 4.032 g/ mole G = 56.028 g/ mole

In a constant-pressure calorimeter, 65.0 mL of 0.910 M H₂SO, was added to 65.0 mL of 0.300 M NaOH. The reaction caused the temperature of the solution to rise from 24.00 °C to 26.04 *C. If the solution has the same density and specific heat as water (1.00 g/mL and 4.184 J/g °C), respectively), what is AH for this reaction (per mole of H₂O produced)? Assume that the total volume is the sum of the individual volumes. AH = V 5 R B 6 MacBook Air N 39 8 M command P option kJ/mol H₂O

How much heat is produced when 33.9 g of NO2 react?    4NO2(g) + O2(g) →  2N2O5(g)      heat of reaction = –110.2 kJ

For the reaction: 2 CH3OH) +3 02(g) (1) → 2 CO2 + 4 H20u) + 4 H200 + 347 kcal Calculate the amount of heat in kcal & kJ released when 25.4 g of CH,OH reacts.

The overall reaction in commercial heat packs can be represented as 4Fe(s) + 302(g) →2Fe₂O3 (8) AH = -1652 kJ a. How much heat is released when 2.20 mol iron is reacted with excess O₂? kl released b. How much heat is released when 1.83 mol Fe2O3 is produced? kJ released c. How much heat is released when 2.20 g iron is reacted with excess O₂? kJ released d. How much heat is released when 11.8 g Fe and 2.61 g O2 are reacted? Submit Answer [Review Topics] kl released Retry Entire Group [References] 8 more group attempts remaining