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What is a Beer-Lambert law? In the absence of A and c values, how the value of E( extinction) is determined?

Chemistry for Engineering Students

4th Edition

ISBN:9781337398909

Author:Lawrence S. Brown, Tom Holme

Publisher:Lawrence S. Brown, Tom Holme

Chapter9: Energy And Chemistry

Section: Chapter Questions

Problem 9.36PAE: 9.36 Define the term calibration.

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What is a Beer-Lambert law? In the absence of A and c values, how the value of E( extinction) is determined?

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Find the AHn for the following reaction: B2H6 (g) + 6 Cl2(9) → 2 BC13(g) + 6 HC(9) given the following reactions and subsequent AH° values $$ H3 BO3 (g) + 3 HC((g) ΔΗ'- -113.1 kJ BC13 (g) + 3 H20(1) → B2 H6 + 6 H2O(1) → 2 H3 BO3(9) + 6 H2 (9) AH° = -496 kJ 1 HC(g) AH° = -95.5 kJ (6)1 + (6)H? $$
Use the given bond energy values to estimate ΔH for the following gas-phase reaction. (Simple energy units required for the answer.) D-values in kJ/mol DH-H = 432 DH-Br = 363 DH-C = 413 DH-N = 391 DH-O = 467 DC-C = 347 DC=C = 614 DC≡C = 839 DC-N = 305 DC=N = 615 DC≡N = 891 DC-O = 358 DC=O = 745 DC=O (CO2) = 799 DC≡O=1072 DC-Br = 276 DN-N = 160. DN=N = 418 DN≡N = 941 DO-O = 146 DO=O = 495 DN-O = 201 DN=O = 607 DBr-Br = 193 DC-Cl = 339 DH-Cl = 427 DCl-Cl = 239
29) a) 1) Brz, Fe 2) اج Aldz clijc, Ales 2) Br₂, Fe 3) Zn (Hy), HCl, heat Br لا لط امين Ald3 2) Brz, Fe d) 1j B₁₂ Fe 2) cl, Aletz 3) Zn (ity), HCl, heat
Use the given bond energy values to estimate ΔH for the following gas-phase reaction (see image attached) D-values in kJ/mol DH-H = 432 DH-Br = 363 DH-C = 413 DH-N = 391 DH-O = 467 DC-C = 347 DC=C = 614 DC≡C = 839 DC-N = 305 DC=N = 615 DC≡N = 891 DC-O = 358 DC=O = 745 DC=O (CO2) = 799 DC≡O=1072 DC-Br = 276 DN-N = 160. DN=N = 418 DN≡N = 941 DO-O = 146 DO=O = 495 DN-O = 201 DN=O = 607 DBr-Br = 193 DC-Cl = 339 DH-Cl = 427 DCl-Cl = 239 (Simple energy units required for the answer.)
10. Use the given average bond dissociation energies, D, to estimate AH for the following reaction: cH+(g)+HI(g) Bond | D, kJ/mol C-I 240 H-I 298 H-H 436 C-H 410
Consider the problem below: (Equation 1) H2g) + 1/2 O2(g) H2O) AH = -285.8 kJ/mol ---> (Equation 2) C(s) + O2(g) CO2(g) AH = -393.5 kJ/mol --- (Equation 3) 2 C(s) + H2(g) ---> C2H2(g) AH = 226.7 kJ/mol %3D (Equation 4) 2 C2H2(g) + 5 O2e) ---> 4 CO2(e) + 2 H20) AH = ??????? ---> 4 CO2(g) %3D To find AH for equation 4 you must: Screen Reader Version Consider the problem below: (Equation 1) H2(g) + 1/2 O2(g) arrow H201) AH = minus 285.8 kJ/mol (Equation 2) C(s) + O2(g) arrow CO2(g) AH = minus 393.5 kJ/mol 2 C(s) + H2(g) arrow C2H2(g) AH = 226.7 kJ/mol (Equation 4) 2 C2H2(g) + 5 O2(g) arrow 4 CO2(g) + 2 H2OU) AH = ??????? %3D To find AH for equation 4 you must:
Determine E, H, G, and S for CH4 at standard pressure and 25°C. σ equals 12 for methane and the atomization energy of CH4 is 1163 kJ/mol.
2. Does an exothermic reaction go more to completion if I raise the temperature, lower the temperature, or perform the experiment at room temperature? Briefly explain.
9.36 Define the term calibration.
Find the AHn for the following reaction: B2 He (g) + 6 Cl2(9) → 2 RC13(9) + 6 HC(g) given the following reactions and subsequent AH° values $$ BC13 (9) + 3 H2O(1) → H3 BO3(g) + 3 HCl(g) AH° = -113.1 kJ B2 H6 + 6 H2O(l) → 2 H3 BO3(9) + 6 H2 (9) AH° = -496 kJ 1 1 H2 (g) + Cl,(g) 2 HC(g) AH° = -95.5 kJ 2 $$
42. Calculate the energy change for the reaction Feg Oz (@ + CoGg)_ 2 FeO (s) + (0₂ (g) from the following Feg 03 (s) + 3 Co(g) → o (s) + (o (g) Feo & Fe(s) + 3 (Q₂ (9) AH -- 23-4 kj -> Fe (s) + Co₂ (g) AH - - 10.919.
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) = -285.8