Question 1
According to the following reaction, how much energy is evolved during the reaction of 32.5 g B
2H
6 and 72.5 g Cl
2? The molar mass of B
2H
6 is 27.67 g mol
-1.
B2H6(g) + 6Cl2(g) → 2BCl3(g) + 6HCl(g) | DrH° = -1396 kJ |
◦ 429 kJ
◦ 1430 kJ
◦ 3070 kJ
◦ 1640 kJ
◦ 238 kJ
Question 2
According to the following reaction, how much energy is evolved during the reaction of 2.50 L B
2H
6 and 5.65 L Cl
2 (both gases are initially at STP)? The molar mass of B
2H
6 is 27.67 g mol
-1.
B2H6(g) + 6Cl2(g) → 2BCl3(g) + 6HCl(g) | DrH° = -1396 kJ |
◦ 352 kJ
◦ 508 kJ
◦ 156 kJ
◦ 57.8 kJ
◦ 215 kJ