Open Question
Which answer best describes the transfer of heat that occurs when 1.30 mol of H2 reacts?
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views
8. Thermochemistry
Enthalpy of Formation
Back8. Thermochemistry
Enthalpy of Formation
- Open Question
4 NH3(g) + 5 O2(g) → 4 NO(g) + 6 H2O(g)
712views - Open Question
What is the change in enthalpy associated with the combustion of 530 g of methane (CH4)?
614views - Open Question
The enthalpy of the reaction is –2,840 kJ. What is the heat of combustion, per mole, of glucose?
591views - Multiple ChoiceGiven the reaction 2C6H6(l) + 15O2(g) → 12CO2(g) + 6H2O(l), what is the standard enthalpy change (ΔH°) of this reaction in kJ?348views
- Multiple ChoiceA 0.1326 g sample of magnesium was burned in an oxygen bomb calorimeter. The total heat capacity of the calorimeter plus water was 5,760 J/°C. If the temperature rise of the calorimeter with water was 0.570°C, calculate the enthalpy of combustion of magnesium in kJ/mol.339views
- Multiple ChoiceWhat is the enthalpy change (ΔH) for the dissolution of 1 mole of substance X in water, given that the temperature of the solution increases from 12.0 °C to 30.0 °C when 1.40 g of X is dissolved in 35.0 mL of water? Assume the specific heat capacity of water is 4.18 J/g°C and the density of water is 1.00 g/mL.395views
- Multiple ChoiceWhich of the following expressions correctly calculates the change in enthalpy (ΔH) for a reaction using standard heats of formation?342views
- Multiple ChoiceWhich of the following statements is true regarding the enthalpy change of a reaction when the quantities of reactants are doubled?281views
- Multiple ChoiceCalculate the enthalpy change for the reaction: NO(g) + O(g) -> NO2(g), given the following standard enthalpies of formation: ΔHf°[NO(g)] = 90.25 kJ/mol, ΔHf°[O(g)] = 249.17 kJ/mol, ΔHf°[NO2(g)] = 33.18 kJ/mol.198views
- Multiple ChoiceCalculate the standard enthalpy change for the following reaction at 25°C using the standard enthalpies of formation: C3H8 (g) + 5O2 (g) -> 3CO2 (g) + 4H2O (g). Given: ΔHf° [C3H8 (g)] = -104.7 kJ/mol, ΔHf° [CO2 (g)] = -393.5 kJ/mol, ΔHf° [H2O (g)] = -241.8 kJ/mol.236views
- Multiple ChoiceChoose the reaction that illustrates the standard enthalpy of formation (ΔHf°) for Ca(NO2)2.372views
- Multiple ChoiceWhich of the following reactions represents the standard enthalpy of formation (ΔHₒƒ) for CsHSO4(s)?351views
- Multiple ChoiceConsider the combination reaction: 2Mg(s) + O2(g) → 2MgO(s) with ΔH = -1204 kJ. What is the enthalpy change for the decomposition of 1 mole of MgO(s) into Mg(s) and O2(g)?377views
- Multiple ChoiceWhich of the following statements correctly describes the calculation of the enthalpy change (ΔH_rxn) for a chemical reaction using bond enthalpies?274views