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Tungsten carbide (WC) is an extremely hard material that is often used to create or coat...
Determine the ethalpy of reaction, delta H, for the formation of tungsten carbide, WC, from the...
Determine the ethalpy of reaction, delta H, for the formation of tungsten carbide, WC, from the elements. W(s) + C(graphite) = WC (s) The heats of combustion of the elements and of tungsten carbide are: 2 W(s) + 3 O2 (g) = 2 WO3 (s); delta H = -1685.8 KJ C (graphite) + O2 (g) = CO2 (g); delta H = -393.5 KJ 2WC (s) + 5 O2 (g) = 2 WO3 (s) + 2 CO2 (g); delta H =...
rd enthalpy of formation for compound WC(s) from Wis) and Clgraphite) is difficult to measure directly...
rd enthalpy of formation for compound WC(s) from Wis) and Clgraphite) is difficult to measure directly because the reaction occurs at 1400°C w(s) + C(graphite) → WC(s) H combustion of the elements and of tungsten carbide can be measured and are given b However, the heats of 2w(s) + 302(g) → 2W03(s) C(graphite) + O2(g) → CO2(g) 2wc(s) + 502(g) → 2W03(s) + 2CO2(g) Δ H =-1680.6 kJ Δ H =-393.5 kJ Δ H =-2391.6 kJ Use Hess law and...
Hello! these are physical chemisty questions. I answered them incorrectly. Thank you for your help! The...
Hello! these are physical chemisty questions. I answered them
incorrectly. Thank you for your help!
The following applies to questions 17-21. Consider 1.00 mol of an ideal gas (Cp -5/2 R) initially at 1.00 atm that undergoes an isobaric expansion from 12.2 L to 22.4L Calculate AT, 4, w, AU, and AH for the change. AT = __K The following applies to question 12-16. Consider 1.00 mol of an ideal gas (CV-3/2 R) occupying 22.4 L that undergoes an isochoric...
4. Sodium lamps are commonly used to illuminate highways because of their intense yellow- orange emissions at 589 nm a. Calculate the energy, in joules, of one photon of this light. b. Calculate...
4. Sodium lamps are commonly used to illuminate highways because of their intense yellow- orange emissions at 589 nm a. Calculate the energy, in joules, of one photon of this light. b. Calculate the energy, in kilojoules, of one mole of such photons 5. What is the de Broglie wavelength (in nm) associated with a 2.5 g Ping-Pong ball traveling at 15.6 m/s? 6. What are the possible values of I and what are the possible subshells for an e...
0 AH; (kl mol-1) 90.37 33.8 81.57 9.67 Ca(s) 0 11 Review Intelligent Tutoring Problem...
0 AH; (kl mol-1) 90.37 33.8 81.57 9.67 Ca(s) 0 11 Review Intelligent Tutoring Problem 6.93 Using the data in the table below, calculate AH° in kilojoules for the following reactions. Standard Enthalpies of Formation of Typical Substances Substance AH() mol-1) Substance AH (K) mol-1) Substance Ag(s) H2O2(0) -187.6 CH (8) AgBr() -100.4 HBrg) -36 CH,OH(I) AgCl(s) - 127.0 HCl(g) -92.30 AO) HI(g) 26.6 CaBr20) Al2O3() -- 1669.8 HNO3(1) -173.2 CaCO3(9 CG) (graphite) H2SO4) -811.32 CaCl (5) CO(g) -110.5...
Incorrect. Did you remember to multiply the enthalpy values by the stoichiometric coefficients? Did you...
Incorrect. Did you remember to multiply the enthalpy values by the stoichiometric coefficients? Did you do enthalphy of products minus enthalphy of reactants? a) CH4(g)+C2(g) CH3Cl(g) +HCI(g) The number of significant digits is set to 3; the tolerance is +/-2 % x Incorrect. Did you remember to multiply the enthalpy values by the stoichiometric coefficients? Did yoif do enthalphy of products minus enthalphy of reactants? co(NH2) 2(s) + H20() b) 2NH3(g) + Co2(g) kJ The number of significant digits is...
< 9 of 13 Review Constants Periodic Table Part A A calorimeter contains 28.0 mL of...
< 9 of 13 Review Constants Periodic Table Part A A calorimeter contains 28.0 mL of water at 11.0 °C. When 250 g of X (a substance with a molar mass of 60.0 g/mol) is added, it dissolves via the reaction X(s) + H2O(1) X(aq) and the temperature of the solution increases to 30.0 °C. Calculate the enthalpy change, AH, for this reaction per mole of X. Assume that the specific heat of the resulting solution is equal to that...
Typical Math Problems 1) What is the pH of a buffer solution which is 0.12M in...
Typical Math Problems 1) What is the pH of a buffer solution which is 0.12M in benzoic acid, pKa 4.19, and is 0.11M in sodium benzoate? 2) Find the %-diss of a buffer if the pKa 7.10 and the pH of the buffer is 7.50. 3) A weak monoprotic acid has a pKa 6.15. 50.00 mL of an 0.1250M aqueous solution of this weak acid is titrated with 0.1000M Na0H. a) What is the equivalence point volume and ½ equivalence...
< 9 of 13 Review Constants Periodic Table Part A A calorimeter contains 28.0 mL of...
< 9 of 13 Review Constants Periodic Table Part A A calorimeter contains 28.0 mL of water at 11.0 °C. When 250 g of X (a substance with a molar mass of 60.0 g/mol) is added, it dissolves via the reaction X(s) + H2O(1) X(aq) and the temperature of the solution increases to 30.0 °C. Calculate the enthalpy change, AH, for this reaction per mole of X. Assume that the specific heat of the resulting solution is equal to that...
I hope the answer is clear and correct thanks Question 1 (1 point) What is the...
I hope the answer is clear and correct thanks
Question 1 (1 point) What is the change in enthalpy (in kJ mol'?) for the following reaction F2(g) + Cabr,(s) CaF() + Brz(1) O 1) -112 kJmo12 O2) 504 kJmo11 03) -504 kJmol 1 04) 537 kJmo11 O 5) -537 kJmol'i Question 2 (1 point) What is true about the following reaction at 25°C? F,(g) + 2HCl(g) 2 2017(g) + H (9) Ahrº=76 kJ mol'i Asr°=-10.13 J mol'i Ki Agrº=79 kJ...
rd enthalpy of formation for compound WC(s) from Wis) and Clgraphite) is difficult to measure directly because the reaction occurs at 1400°C w(s) + C(graphite) → WC(s) H combustion of the elements and of tungsten carbide can be measured and are given b However, the heats of 2w(s) + 302(g) → 2W03(s) C(graphite) + O2(g) → CO2(g) 2wc(s) + 502(g) → 2W03(s) + 2CO2(g) Δ H =-1680.6 kJ Δ H =-393.5 kJ Δ H =-2391.6 kJ Use Hess law and...
Hello! these are physical chemisty questions. I answered them
incorrectly. Thank you for your help!
The following applies to questions 17-21. Consider 1.00 mol of an ideal gas (Cp -5/2 R) initially at 1.00 atm that undergoes an isobaric expansion from 12.2 L to 22.4L Calculate AT, 4, w, AU, and AH for the change. AT = __K The following applies to question 12-16. Consider 1.00 mol of an ideal gas (CV-3/2 R) occupying 22.4 L that undergoes an isochoric...
4. Sodium lamps are commonly used to illuminate highways because of their intense yellow- orange emissions at 589 nm a. Calculate the energy, in joules, of one photon of this light. b. Calculate the energy, in kilojoules, of one mole of such photons 5. What is the de Broglie wavelength (in nm) associated with a 2.5 g Ping-Pong ball traveling at 15.6 m/s? 6. What are the possible values of I and what are the possible subshells for an e...
0 AH; (kl mol-1) 90.37 33.8 81.57 9.67 Ca(s) 0 11 Review Intelligent Tutoring Problem 6.93 Using the data in the table below, calculate AH° in kilojoules for the following reactions. Standard Enthalpies of Formation of Typical Substances Substance AH() mol-1) Substance AH (K) mol-1) Substance Ag(s) H2O2(0) -187.6 CH (8) AgBr() -100.4 HBrg) -36 CH,OH(I) AgCl(s) - 127.0 HCl(g) -92.30 AO) HI(g) 26.6 CaBr20) Al2O3() -- 1669.8 HNO3(1) -173.2 CaCO3(9 CG) (graphite) H2SO4) -811.32 CaCl (5) CO(g) -110.5...
Incorrect. Did you remember to multiply the enthalpy values by the stoichiometric coefficients? Did you do enthalphy of products minus enthalphy of reactants? a) CH4(g)+C2(g) CH3Cl(g) +HCI(g) The number of significant digits is set to 3; the tolerance is +/-2 % x Incorrect. Did you remember to multiply the enthalpy values by the stoichiometric coefficients? Did yoif do enthalphy of products minus enthalphy of reactants? co(NH2) 2(s) + H20() b) 2NH3(g) + Co2(g) kJ The number of significant digits is...
< 9 of 13 Review Constants Periodic Table Part A A calorimeter contains 28.0 mL of water at 11.0 °C. When 250 g of X (a substance with a molar mass of 60.0 g/mol) is added, it dissolves via the reaction X(s) + H2O(1) X(aq) and the temperature of the solution increases to 30.0 °C. Calculate the enthalpy change, AH, for this reaction per mole of X. Assume that the specific heat of the resulting solution is equal to that...
Typical Math Problems 1) What is the pH of a buffer solution which is 0.12M in benzoic acid, pKa 4.19, and is 0.11M in sodium benzoate? 2) Find the %-diss of a buffer if the pKa 7.10 and the pH of the buffer is 7.50. 3) A weak monoprotic acid has a pKa 6.15. 50.00 mL of an 0.1250M aqueous solution of this weak acid is titrated with 0.1000M Na0H. a) What is the equivalence point volume and ½ equivalence...
< 9 of 13 Review Constants Periodic Table Part A A calorimeter contains 28.0 mL of water at 11.0 °C. When 250 g of X (a substance with a molar mass of 60.0 g/mol) is added, it dissolves via the reaction X(s) + H2O(1) X(aq) and the temperature of the solution increases to 30.0 °C. Calculate the enthalpy change, AH, for this reaction per mole of X. Assume that the specific heat of the resulting solution is equal to that...
I hope the answer is clear and correct thanks
Question 1 (1 point) What is the change in enthalpy (in kJ mol'?) for the following reaction F2(g) + Cabr,(s) CaF() + Brz(1) O 1) -112 kJmo12 O2) 504 kJmo11 03) -504 kJmol 1 04) 537 kJmo11 O 5) -537 kJmol'i Question 2 (1 point) What is true about the following reaction at 25°C? F,(g) + 2HCl(g) 2 2017(g) + H (9) Ahrº=76 kJ mol'i Asr°=-10.13 J mol'i Ki Agrº=79 kJ...
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