Multiple Choice
Which statement about the standard enthalpy of formation (ΔH_f^ext{°}) is true?
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8. Thermochemistry
Enthalpy of Formation
Back8. Thermochemistry
Enthalpy of Formation
- Multiple ChoiceWhich factor is most important when predicting trends in the enthalpy of solution for ionic compounds?21views
- Multiple ChoiceWhich of the following can be calculated using the standard enthalpies of formation of reactants and products?21views
- Multiple ChoiceWhat is the standard enthalpy of formation (ΔH_f^ext{°}) for H_2O(l) in kJ/mol?39views
- Multiple ChoiceWhich of the following reactions represents the standard enthalpy of formation (ΔH_f^∘) for water (H_2O(l))?19views
- Multiple ChoiceWhich of the following substances has a standard enthalpy of formation equal to zero under standard conditions?22views
- Multiple ChoiceIn the context of enthalpy of formation, what does it mean when the enthalpy change (ΔH) for a reaction is negative?28views
- Multiple ChoiceUsing standard thermodynamic data, calculate ΔH°rxn for the following:
2 C2H2 (g) + 5 O2 (g) → 4 CO2 (g) + 2 H2O (l)
691views - Multiple Choice
The oxidation of ammonia is illustrated by the following equation:
4 NH3 (g) + 5 O2 (g) → 4 NO (g) + 6 H2O (g)
Calculate the enthalpy of reaction,ΔHRxn, based on the given standard heats of formation.
3667views2rank - Multiple Choice
Consider the following equation:
2 ClF3(g) + 2 NH3(g) → 1 N2(g) + 6 HF (g) + 6 Cl2(g)ΔHrxn = –1196 kJ
Determine the standard enthalpy of formation for chlorine trifluoride, ClF3.
4223views3rank3comments - Multiple ChoiceFind ΔHrxn for the following reaction:
N2 + 2 O2 → 2 NO2
Based on the following data.
2 NO → N2 + O2 ΔH = −180 kJ
2 NO + O2 → 2 NO2 ΔH = −112 kJ1039views - Multiple ChoiceIn which of the following is ΔH°rxn = ΔH°f at 1 atm and 298 K?834views
- Open Question
Calculate the enthalpy of the reaction 2NO(g) + O2(g) → 2NO2(g) given the following reactions and enthalpies of formation: 12N2(g) + O2(g) → NO2(g), δH∘a=33.2 kJ 12N2(g) + 12O2(g) → NO(g), δH∘b=90.2 kJ
1392views - Open Question
What is the isobaric heat of combustion for ethane, C2H6(g), in kJ per mole of ethane at 298.15 k?
671views - Open Question
How much energy is required to decompose 765 g of PCl3
685views