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Posted: **Thu Jun 30, 2022 6:25 pm**

: Use The References To Access Important Values If Needed For This Question A Scientist Measures The Standard Enthalpy Ch 1 (99.92 KiB) Viewed 67 times

Use the References to access important values if needed for this question. A scientist measures the standard enthalpy change for the following reaction to be -816.7 kJ: Fe2O3 (s) + 2Al(s) → Al2O3(s) + 2Fe(s) Based on this value and the standard enthalpies of formation for the other substances, the standard enthalpy of formation of Fe2O3 (s) is kJ/mol Species AH (kJ/mol) Al2O3 (8) Fe(s) Al(s) Submit Answer -1675.7 0.0 0.0 Retry Entire Group 9 more group attempts remaining
Use the References to access important values if needed for this question. A scientist measures the standard enthalpy change for the following reaction to be 80.5 kJ: NH4Cl(aq) → NH3 (9) + HCl(aq) Based on this value and the standard enthalpies of formation for the other substances, the standard enthalpy of formation of HCl(aq) is kJ/mol. Substance AH (kJ/mol) NH4Cl(aq) NH3 (9) Submit Answer -299.7 -46.1 Retry Entire Group 9 more group attempts remaining
Use the References to access important values if needed for this question. A scientist measures the standard enthalpy change for the following reaction to be -13.4 kJ: Ca(OH)2 (aq) + 2HCl(aq) → CaCl₂ (s) + 2H₂O(1) Based on this value and the standard enthalpies of formation for the other substances, the standard enthalpy of formation of HCl(aq) is kJ/mol. Species CaCl₂ (s) H₂O(l) Ca(OH)2 (aq) Submit Answer ΔΗ (kJ/mol) -795.8 -285.8 -1002.8 Retry Entire Group 9 more group attempts remaining