The value of ?H° for the reaction below is -72 kJ. __________ kJ of heat are released when 1.0 mol of HBr is formed in this reaction.
H2 (g) + Br2 (g) ? 2HBr (g)
The value of ?H° for the reaction below is -126 kJ. The amount of heat that is released by the reaction of 25.0 g of Na2O2 with water is __________ kJ.
2Na2O2 (s) + 2H2O (l) ? 4NaOH (s) + O2 (g)
The value of ?H° for the reaction below is -6535 kJ. __________ kJ of heat are released in the combustion of 16.0 g of C6H6 (l)?
2C6H6 (l) + 15O2 (g) ? 12CO2 (g) + 6H2O (l)
The value of ?H° for the reaction below is -336 kJ. Calculate the heat (kJ) released to the surroundings when 23.0 g of HCl is formed.
CH4 (g) + 3Cl2 (g) ? CHCl3 (l) + 3HCl (g)
The value of ?H° for the reaction below is -1107 kJ:
2Ba (s) + O2 (g) ? 2BaO (s)
How many kJ of heat are released when 5.75 g of BaO (s) is produced?
The specific heat capacity of lead is 0.13 J/g-K. How much heat (in J) is required to raise the temperature of of lead from 22°C to 37°C?
?H for the reaction
IF5 (g) ? IF3 (g) + F2 (g)
is __________ kJ, give the data below.
IF (g) + F2 (g) ? IF3 (g) ?H = -390 kJ
IF (g) + 2 F2 (g) ? IF5 (g) ?H = -745 kJ
Given the following reactions
N2 (g) + 2O2 (g) ? 2NO2 (g) ?H = 66.4 kJ
2NO (g) + O2 (g) ? 2NO2 (g) ?H = -114.2 kJ
the enthalpy of the reaction of the nitrogen to produce nitric oxide
N2 (g) + O2 (g) ? 2NO (g)
is __________ kJ.
The value of ?H° for the reaction below is -186 kJ.
H2 (g) + Cl2 (g) ? 2HCl (g)
The value of ?Hf° for HCl (g) is __________ kJ/mol
Given the data in the table below, ?H°rxn for the reaction
Ca(OH)2 + 2H3AsO4 ? Ca(H2AsO4)2 + 2H2O
is __________ kJ.
Entalþy of formation
Ca(OH)2 -986.6 kj/mol
H3AsO4 -900.4 kj/mol
Ca(H2AsO4)2 -2346 kj/mol
H2O -285.9 kj/mol
A 25.5-g piece of cheddar cheese contains 37% fat, 28% protein, and 4% carbohydrate. The respective fuel values for protein, fat, and carbohydrate are 17, 38, and 17 kJ/g, respectively. The fuel value for this piece of cheese is __________ kJ.
The average fuel value of sugars is 17 kJ/g. A 2.0 L pitcher of sweetened Kool-Aid contains 400 g of sugar. What is the fuel value (in kJ) of a 500 mL serving of Kool-Aid? (Assume that the sugar is the only fuel source.) 14) ______
A) 1.7 × 106
B) 1.7 × 103
C) 4.2 × 104
D) 17
E) 1.7 × 102