For the reaction 2 H2S(g) <==> 2 H2(g) + S2(g) the value of Kc = 1.6e-2 Calculate the value of Kc for this second reaction below: 8 H2(g) + 4 S2(g) <==> 8 H2S(g)
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For the reaction
2 H2S(g) <==> 2 H2(g) + S2(g)
the value of Kc = 1.6e-2
Calculate the value of Kc for this second reaction below:
8 H2(g) + 4 S2(g) <==> 8 H2S(g)
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- Calculate the ΔH°f of C6H12O6(s) from the following data: Show the complete and step by step solution ΔH combustion of C6H12O6(s) = -2816kJ/mol ΔH°f of CO2 (g) = -393.5 kJ/mol ΔH°f of H2O (l) = -285.9 kJ/mol Equation: C6H12O6(s) + O2(g) -> CO2(g) + H2O(l)Calculate the enthalpy change for the reaction C(s) + 2H2 (g)--->CH4(g) from the following data. C(s) + O2 (g) ---> CO2(g). ΔH = – 393.5 kJ/mol H2(g) + 0.5 O2 (g) ---> H2O(l). ΔH = – 285.8 kJ/mol CH4(g) + 2 O2 (g)---> CO2(g) + 2 H2O(l). ΔH = – 890.2 kJ/molCalculate the heat of reaction of each reaction: (assume density of solution is 1.04 g/ml and specific heat of solution is = 3.89 Jg-1K-1) qreaction = -[(∆T x m x cp) + (Cp x ∆T)] I calculated Cp as 429.04 DeltaT: 4 deg C Products: 50 mL of 1.0 M HCl and 50 mL of 1.0 M of NaOH
- A pellet of benzoic acid standard was combusted in a bomb calorimeter to determine the experimental calorimeter constant. After 6 mins of monitoring the temperature, the bomb was fired. The following data were obtained. mole of benzoic acid: 0.0049 mol mass of burnt fuse wire: 0.0125 g qwire,surr: 5858 J/g ΔHcombustion of benzoic acid: -3228.0 kJ/mol Δng (combustion of benzoic acid): -0.5 mol R: 8.314 J/mol•K r1: 0ºC/min r2: 0ºC/min Tf: 30.4ºC Ti: 28.4ºC Determine the calorimeter constant (in J/ºC). Report your answer in 2 decimal places.1. CaCO3(s) <--> CaO(s) + CO2(g) ΔH° = +178 kJ exo or endo - thermic remove mass(CaO) --> shift: __ (increase) P(CO2) shift? __ ... two ways to lose mass(CaCO3)? __________ higher T shift? __ 2. SO2(g) <--> (1/8)S8(s) + O2(g) ΔH° = +297 kJ exo or endo - thermic Δν(gas)= _, (increase)Vtot --> P(gas)_ > on _hs shift? __ (decrease)P(SO2) shift? __ ... two ways to make mass(S8)? ___________ lower T shift? __ 3. C(s) + 2H2(g) <--> CH4(g) ΔH° = –75 kJ exo or endo - thermic Δν(gas) = _, (decrease)Vtot -->P(gas)_ > on _hs shift? __ (increase)P(CH4) shift? __ ...two ways to to lose mass(C)? ___________ higher T shift? __When a neutralization reaction was carried out using 100.0 mL of 0.7890M NH3 water and 100.0 mL of 0.7940M acetic acid, ΔT was found to be 4.76 °C. The specific heat of the reaction mixture was 4.104 J g-l K-1 and its density was 1.03 g mL-1. The calorimeter constant was 3.36 JK-1 a) Calculate ΔH neutralization for the reaction of NH3 and acetic acid. b) At the end of the experiment, it was discovered that the thermometer had not been calibrated. When it was calibrated, it was found that the thermometer read 0.50 °C low. What effect would this thermometer reading have on the reported DH neutralization calculated above? c) When the temperature-time data graph was reviewed, it was found that an error had been made in determining ΔT. Instead of 4.76 °C, ΔT was actually 4.70 °C. Based on this change only, calculate the correct ΔH neutralization for the reaction of NH3, and acetic acid. d) Calculate the percent error for the correct ΔH neutralization if aΔ DT of 4.76 °C had been used.…
- When a neutralization reaction was carried out using 100.0 mL of 0.7890M NH3 water and 100.0 mL of 0.7940M acetic acid, ΔT was found to be 4.76 °C. The specific heat of the reaction mixture was 4.104 J g-l K-1 and its density was 1.03 g mL-1. The calorimeter constant was 3.36 JK-1 a) Calculate ΔH neutralization for the reaction of NH3 and acetic acid. b) At the end of the experiment, it was discovered that the thermometer had not been calibrated. When it was calibrated, it was found that the thermometer read 0.50 °C low. What effect would this thermometer reading have on the reported DH neutralization calculated above? c) When the temperature-time data graph was reviewed, it was found that an error had been made in determining ΔT. Instead of 4.76 °C, ΔT was actually 4.70 °C. Based on this change only, calculate the correct ΔH neutralization for the reaction of NH3, and acetic acid. d) Calculate the percent error for the correct ΔH neutralization if aΔ DT of 4.76 °C had been used.…I need it in 6 min!!! When H2 iscombusted in the presence of excess O2 to form liquid water, what is ∆H° to the nearest kJ? Sign must be correct for full credit. ∆Hf° (H2O(l)) = −286 kJ. 2 H2 (g) + O2 (g) --> 2 H2O(l)0 Calculate AH for the following reaction, after it is properly balanced with smallest whole-number coefficients: rxn C,H%(g) + Ozg) → COz(g) + H,O(g) AH [C₂H6(g)] = -84.667 kJ/mol AH [CO₂(g)] = -393.5 kJ/mol AH [CO₂(aq)] = −412.9 kJ/mol AH [H₂O(g)]=-241.826 kJ/mol AH [H₂O()] = -285.840 kJ/mol f kJ [unbalanced]
- At constant pressure and 25^C, What is delta H for the following reaction. 2C2H6(g) + 7O2(g) = 4CO2(g) + H2O(l) if the complete consumption of 38.2 g of C2H6 libraties 1981 KJ of heat energy?Using data for DHof (KJ/mol) provided below, calculate DHoRxn for: N2O(g) + 3H2(g) ---> N2H4 (l) + H2O (l) DHof (KJ/mol): N2O(g) = 33.85 ; H2 (g)= 0 ; N2H4 (l)= 50.4 ; H2O(l) = -285.8How does the answer in the first example include a 0 when its not a sig fig. but in the second one it does not