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- Practice Exercise 1If the heat of formation of H2O1l2 is -286 kJ>mol, whichof the following thermochemical equations is correct?(a) 2 H1g2 + O1g2¡H2O1l2 ΔH = -286 kJ(b) 2 H21g2 + O21g2¡2 H2O1l2 ΔH = -286 kJ(c) H21g2 + 12 O21g2¡H2O1l2 ΔH = -286 kJ(d) H21g2 + O1g2¡H2O1g2 ΔH = -286 kJ(e) H2O1l2¡H21g2 + 12O21g2 ΔH = -286 kJarrow_forwardHomework 3 • Use standard enthalpies of formation from Table 7.2 to determine the enthalpy change at 25 °C for the following reaction. 2 Cl2(g) + 2H20(1) 4 HCI( g) + O2(g) AH° = ?arrow_forwardA 100.0-g sample of cold water at 20.0oC is added to a warm water of unknown mass at 65.0oC. If the final temperature of the mixture is 45.0oC, what is the mass of the warm water? (Specific heat of water = 4.184 J/g.oC) (A) 44.4 g (B) 69.2 g (C) 125 g (D) 225 garrow_forward
- Question: Determine the enthalpy of formation of liquid hydrogen peroxide, H2O2, at 25°C from the following thermochemical equations:" 11 Since the equation is not given, you have to write the balanced equation to form I mol H;O2 from elements! H2 (g) + ½ O2 (g) → H2O (g) 2H (g) + ½ O2 (g) → H2O (g) 2H (g) + 20 (g) → H2O2 (g) 20 (g) → H2O2 (1) → H2O2 (g) AH° = -241.82 kJ/mol AH° = -926.92 kJ/mol AH° = -1070.60 kJ/mol O2 (g) AH° = -498.34 kJ/mol AH° = +52.46 kJ/mol [+60.38 kJ mot')arrow_forwardQuestion 2 of 2 Submit Using the equations Sro (s) + CO, (g) → SrCO3 (s) AH° = -234 kJ/mol 2 Sr(s) + O2 (g) → 2 SrO (s) AH° = -1184 kJ/mol CO2 (g) → C(s) + O2 (g) AH° = 394 kJ/mol Determine the enthalpy for the reaction 2 SrCO3 (s) → 2 Sr (s) + 2 C(s) + 3 O, (a). | KJ/mol 1 2 4 6. C 7 8 +/- х 100 Tap here or pull up for additional resources 3. LOarrow_forwardQuestion 5 of 21 Submit Using the equations 2 Sr(s) + O2 (g) → 2 Sro (s) AH° = -1184 kJ/mol CO2 (g) → C (s) + O2 (g) AH° = 394 KJ/mol %3D Determine the enthalpy (in kJ/mol) for the reaction C(s) + 2 SrO(s) → CO2 (g) + 2 Sr(s). kJ/mol 1 2 4 6. C 7 8 +/- x 10 0 3. LOarrow_forward
- Question 1 of 2 Submit Using the equations 2 Fe (s) + 3 Cl (g) → 2 FeCl3 (s) AH° = -800.0 kJ/mol Si(s) + 2 Cl2 (g) → SICI, (s) AH° = -640.1 kJ/mol Determine the enthalpy for the reaction 3 SiCla (s) + 4 Fe (s) → 4 FeCl3 (s) + 3 Si (s) kJ/mol 1 2 4 6. C 7 8 +/- x 10 0 Tap here or pull up for additional resources 3. LOarrow_forwardMacmillan Learning Question 13 of 13 > At constant volume, the heat of combustion of a particular compound is -3549.0 kJ/mol. When 1.561 g of this compoun (molar mass = 166.20 g/mol) was burned in a bomb calorimeter, the temperature of the calorimeter, including its content. by 4.467 °C. What is the heat capacity (calorimeter constant) of the calorimeter? calorimeter constant: OO HUAWEI P30 LEICA TRIPLE CAMERA Answer a 7:25 PM 11/20/2022 - kJarrow_forward(D 263 kJ/mol P. 22. Using the following thermochemical equations: C(s) + O,(g) → CO,(g) ΔΗΟ. rxn 1 =-394 kJ/mol,Txn C(s) + CO,(g) → 2 CO(g) AH°. Ixn 2 =+173 kJ/mol,xa Determine the enthalpy of the reaction represented below: 2 C(s) + 0,(g) → 2 CO(g) ΔΗ Txn 3 = ? 1> (A) ΔΗ. :-567 kJ/molxn rxn (В) ДН =-221 kJ/mol,xn (С) ДН =+221 kJ/molpxn (D) AH°. +567 kJ/molpxn %3D Ixn qt ian od geind hw qua boalunai na cop d ofiosa orb d A 100--32 HO0-02 X convinn or rmrainn an nart of this nanA iR llanal.arrow_forward
- A scientist measures the standard enthalpy change for the following reaction to be -555.6 kJ : 2Co(g) + 02(92CO,(g) Based on this value and the standard enthalpies of formation for the other substances, the standard enthalpy of formation of CO(g) is ] kJ/mol. Submit Answer Retry Entire Group 9 more group attempts remainingarrow_forwardA scientist measures the standard enthalpy change for this reaction to be -907.4 kJ/mol. 2NH3(g) + 3 N₂O(g) 4N₂(g) + 3 H₂O(g) Based on this value and the standard formation enthalpies for the other substances, the standard formation enthalpy of H₂O(g) is kJ/mol. Submit Answer Retry Entire Group 3 more group attempts remainingarrow_forwardQuestion 11 of 11 Submit Using the provided table, determine the enthalpy for the reaction 2 NH3 (g) + 3 N20 (g)→ 4 N2 (g) + 3 H2O (1) Substance AHť (kJ/mol) kJ/mol NHз (9) -46.2 N20 (g) 81.6 1 3 N2 (g) 4 6. C H2O (1) -285.8 7 8 +/- х 100 LOarrow_forward
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