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Bond energy of hydrogen gas is -433 kJ. How much is the bond dissociation energy of 0.5 mole of hydrogen gas?

A. -433 kJ
B. +433 kJ
C. -216 kJ
D. +216 kJ

Sagot :

GinnyAnsweridn
Sure! Let's solve the problem step-by-step.

1. Understand the problem:
- We are given the bond energy of hydrogen gas, which is -433 kJ per mole.
- We need to find the bond dissociation energy for 0.5 moles of hydrogen gas.

2. Identify the bond energy:
- The bond energy of hydrogen gas is given as -433 kJ per mole.

3. Understand the concept:
- Bond energy represents the energy required to break one mole of bonds in a substance. In the case of hydrogen gas (H₂), this energy is given as -433 kJ per mole.

4. Calculate the bond dissociation energy for 0.5 moles:
- If the bond energy for 1 mole is -433 kJ, then for 0.5 moles, it would be half of this value.

5. Perform the calculation:
- Bond dissociation energy = 0.5 moles × -433 kJ per mole
- Bond dissociation energy = -216.5 kJ

6. Choose the correct answer:
- The bond dissociation energy for 0.5 moles of hydrogen gas is -216.5 kJ, but the closest option provided in the question is -216 kJ.

So, the correct answer is:
(C) -216 kJ
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