Enthalpy Stoichiometry
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Last updated almost 3 years ago
12 questions
Give answers in correct significant figures and use unit abbreviations.
1
How much heat will be released when 6.44 g of sulfur reacts with excess oxygen? ΔH = -792 kJ/mol
How much heat will be released when 6.44 g of sulfur reacts with excess oxygen? ΔH = -792 kJ/mol
1
How much heat will be released when 4.72 g of carbon reacts with excess oxygen? ΔH = -393.5 kJ/mol
How much heat will be released when 4.72 g of carbon reacts with excess oxygen? ΔH = -393.5 kJ/mol
1
How much heat will be absorbed when 38.2 g of bromine reacts with excess H2? ΔH = +72.80 kJ/mol
How much heat will be absorbed when 38.2 g of bromine reacts with excess H2? ΔH = +72.80 kJ/mol
1
What mass of propane, C3H8, must be burned to produce 76,000 kJ of energy? ΔH = -2200 kJ/mol
What mass of propane, C3H8, must be burned to produce 76,000 kJ of energy? ΔH = -2200 kJ/mol
1
How much heat will be released when 1.48 g of chlorine reacts with excess phosphorus? ΔH = -886 kJ/mol
How much heat will be released when 1.48 g of chlorine reacts with excess phosphorus? ΔH = -886 kJ/mol
1
How much heat will be absorbed when 13.7 g of nitrogen reacts with excess oxygen? ΔH = +180 kJ/molN2 + O2 --> 2 NO
How much heat will be absorbed when 13.7 g of nitrogen reacts with excess oxygen? ΔH = +180 kJ/mol
N2 + O2 --> 2 NO
1
What mass of iron must react with excess oxygen in order to produce 3600 kJ of energy? ΔH = -1120 kJ/mol3Fe + 2O2 --> Fe3O4
What mass of iron must react with excess oxygen in order to produce 3600 kJ of energy? ΔH = -1120 kJ/mol
3Fe + 2O2 --> Fe3O4
1
How much heat will be released when 12.0 g of H2 reacts with 76.0 g of 02? ΔH = -571.6 kJ/mol
How much heat will be released when 12.0 g of H2 reacts with 76.0 g of 02? ΔH = -571.6 kJ/mol
1
What mass of ammonium nitrate must dissolve in order to absorb 2315 kJ of heat? ΔH = +25.7 kJ/molNH4NO3 (s) --> NH4+ (aq) + NO3- (aq)
What mass of ammonium nitrate must dissolve in order to absorb 2315 kJ of heat? ΔH = +25.7 kJ/mol
NH4NO3 (s) --> NH4+ (aq) + NO3- (aq)
1
When 108 g of aluminum reacts with excess chlorine, 2820 kJ of energy is released. Find ΔH for the reaction.
When 108 g of aluminum reacts with excess chlorine, 2820 kJ of energy is released. Find ΔH for the reaction.
1
How much energy, in kJ, is released when 5.8 L of C8H18 gas, at STP, combusts in excess oxygen gas? ΔH = -5500 kJ/mol2 C8H18 + 25 O2 --> 16 CO2 + 18 H2O
How much energy, in kJ, is released when 5.8 L of C8H18 gas, at STP, combusts in excess oxygen gas? ΔH = -5500 kJ/mol
2 C8H18 + 25 O2 --> 16 CO2 + 18 H2O
1
Calculate the energy required to allow for the reaction when 10.80 g of N2 reacts with 2.75 L of O2 gas at STP. ΔH = +67.6 kJ/mol (Hint: start with the quantity you have of the LR.)N2 + O2 --> 2 NO
Calculate the energy required to allow for the reaction when 10.80 g of N2 reacts with 2.75 L of O2 gas at STP. ΔH = +67.6 kJ/mol (Hint: start with the quantity you have of the LR.)
N2 + O2 --> 2 NO