General Education Diploma (GED Oman) · Physics And Chemistry

Thermochemistry

3 practice questions, each with the answer and an explanation.

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Random questions from this topic, one at a time. You see the answer and the explanation straight after each one.

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Using the bond energies (kJ/mol) H–H 436, Br–Br 193, H–Br 366, estimate the enthalpy change for H $_{2}$ + Br $_{2}$ → 2HBr.
Using the bond energies (kJ/mol) H–H 436, Cl–Cl 243, H–Cl 432, estimate the enthalpy change for H $_{2}$ + Cl $_{2}$ → 2HCl.
Using the bond energies (kJ/mol) H–H 436, F–F 155, H–F 565, estimate the enthalpy change for H $_{2}$ + F $_{2}$ → 2HF.

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