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How many grams of aluminum chloride will be produced from 255 moles of Cl2
The molar enthalpy of reaction of
C5H12(g) + 8 O2(g) → 5 CO2(g) + 6 H2O(g)
is -3244.8 kJ/mol for C5H12(g). If 100.0g of oxygen gas react, how much heat is released by the reaction?
Do not include a sign in your answer.
Ammonium phosphate NH43PO4 is an important ingredient in many fertilizers. It can be made by reacting phosphoric acid H3PO4 with ammonia NH3. What mass of ammonium phosphate is produced by the reaction of 10.g of ammonia? Be sure your answer has the correct number of significant digits.
A 13.97 g sample of ice is heated from -10 oC to its melting point of 0 oC and then melted completely. Next it is raised to its boiling point of 100 oC and boiled completely. Finally the sample is heated to 111 oC. How much energy was absorbed by the sample? (Answer in kJ pay close attention to units!)
Sice=2.1 J/goC Delta Hf = 6.02 kJ/mol
Ssteam=1.7 J/goC Delta Hv = 2.26 kJ/g
A 38.23 g solid sample of mercury is heated from -39 oC its melting point, completely melted then heated to 109 oC, How much energy was absorbed by the sample? (Answer in kJ)
S=0.14 J/goC Delta Hf = 0.011 kJ/g
A 21.34 g sample of aluminum is heated from 28 oC to its melting point of 660 oC and then melted completely. How much energy was absorbed by the sample? (Answer in kJ)
S=0.91 J/goC Delta Hf = 10.7 kJ/mol
A 24.93 g sample of ice is heated from -16 oC to its melting point of 0 oC and then melted completely. Next it is raised to its boiling point of 100 oC and boiled completely. Finally the sample is heated to 113 oC. How much energy was absorbed by the sample? (Answer in kJ pay close attention to units!)
Sice=2.1 J/goC Delta Hf = 6.02 kJ/mol
Ssteam=1.7 J/goC Delta Hv = 2.26 kJ/g
A 36.21 g solid sample of mercury is heated from -39 oC its melting point, completely melted then heated to 92 oC, How much energy was absorbed by the sample? (Answer in kJ)
S=0.14 J/goC Delta Hf = 0.011 kJ/g
A 27.98 g sample of aluminum is heated from 25 oC to its melting point of 660 oC and then melted completely. How much energy was absorbed by the sample? (Answer in kJ)
S=0.91 J/goC Delta Hf = 10.7 kJ/mol
How many moles are in a 29.0 g sample of CrO?
