3. You are given the following standard enthalpies of formation at 25°C. HF (aq) -320.1 kJ/mol...
Be sure to answer all parts. At 25°C, the standard enthalpy of formation of HF(aq) is -320.1 kJ/mol. Of OH(aq), it is -229.5 kJ/mol. Of F (aq), it is -330.2 kJ/mol, and of H2O(l), it is -285.9 kJ/mol. (a) Calculate the standard enthalpy of neutralization of HF(aq): HF(aq) + OH(aq) + (aq) + H2O(1) kJ/mol (b) Using the value of -56.3 kJ as the standard enthalpy change for the reaction H(aq) + OH(aq) +H2O(1) calculate the standard enthalpy of change...
Use the following enthalpies of formation: ∆Hf [Zn(s)] = 0 KJ/mol ∆Hf [ZnCl2(g)]= - 415.1 KJ/mol ∆Hf [HCl(g)] = - 92.31 KJ/mol ∆Hf [H2(g)] = 0 KJ/mol Determine the change in enthalpy for: Zn(s) + 2 HCl(g) → 2 ZnCl2(g) + H2(g) ∆H= ?
A scientist measures the standard enthalpy change for the following reaction to be -56.2 kJ : Ca(OH)2(aq) + 2 HCl(aq)CaCl2(s) + 2 H2O(l) Based on this value and the standard enthalpies of formation for the other substances, the standard enthalpy of formation of CaCl2(s) is kJ/mol. Answer in kJ/mol
help asap 3. Calculate the standard enthalpy change, Hº, for the following reaction using standard enthalpies of formation. (1 point) 2C2H2(g) + 502(g) → 4CO2(g) + 2H20(1) Standard Enthalpies of Formation AH for C2H2(g) = +226.7 kJ/mol AHfor CO2(g) = -393.5 kJ/mol AH for H2O(l) = -285.8 kJ/mol
A scientist measures the standard enthalpy change for the following reaction to be -2847.0 kJ: 2C2H6(g) + 7 02(g) —4CO2(g) + 6H2O(g) Based on this value and the standard enthalpies of formation for the other substances, the standard enthalpy of formation of CzH6(g) is kJ/mol. A scientist measures the standard enthalpy change for the following reaction to be -15.0 kJ : Ca(OH)2(aq) + 2 HCl(aq) +CaCl(s) + 2 H20(1) Based on this value and the standard enthalpies of formation for...
Given the standard enthalpies of formation for the following substances, determine the reaction enthalpy in kJ/mol for the following reaction: 4A (g) + 2B (g) 2C (g) + 7D (g) Substance ΔHf in kJ/mol A (g) – 20.42 B (g) + 32.18 C (g) – 72.51 D (g) – 17.87
1. From the following equations and enthalpies, determine the molar heat of formation of HNO2(aq) . NH4NO2(aq) → N2(g) + 2H2O(l) ∆H = -320.1 kJ NH3(aq) + HNO2(aq) → NH4NO2(aq) ∆H = -37.7 kJ 2NH3(aq) → N2(g) + 3H2(g) ∆H = +169.9 kJ H2(g) + 1/2 O2(g) → H2O(l) ∆H = -285.8 kJ
Given the following standard enthalpy of formations: AH [C,H,OH() --277.7 kJ/mol; AH(CH3CO,H() = -484.5 kJ/mol); AH® [H2O(1) --285.8 kJ/mol]; AH [O2(g) - 0 kJ/mol). Calculate the AHan for the reaction. C,H,OH(I)+,(g) → CH,CO,H(1) + H2O(l)
From the given enthalpies of formation, calculate the enthalpy change for the following reaction. Your label should be in kJ/mol. Again, leave a space between the answer and the label. N2H4(0) + 2H2O2(1) ► N2(g) + 4H2O(1) Thermochemical data: Substance AH(kJ/mol). H2O(1) -285.8 N Hall) 50.7 H2O2(1) -187.8 Answer:
4. Calculate the energy change for the following reaction, using the standard enthalpies of formation provided. SO2Cl2 (I)+2 H2O (I)2 HCI (g) + H,SO4 ) Substance AH (/mol) SO-ClO H2O0) HO(g) НСКО НС 9) H2SO 0) H-SO (aq) -394.1 -285.8 -241.8 92.3 -167.2 814.0 -909.3 If 25.0 kJ of heat energy is added to 50.0 g of water initially at 25°C, what will be the final temperature of the water? The specific heat of water is 4.18 J g1 °C