НаС, CH3 НаС. Н c=C Н c=C CH3 trans-2-butene Н н cis-2-butene

The enthalpy change for the following reaction is -121 kJ. Using bond energies, estimate the C-H bond energy in CH,(g). CH,(g) + Cl½(g) →CH3CI(g) + HCl(g) kJ/mol

Use bond energies (see table) to predict AH for the formation of HCI gas. H2(g) + Cl2(9) → 2 HCl(g) KJ

Please don't provide handwritten solution .....

Suppose there is an element X which occurs naturally as X2(g).X2(g) + 2O2(g) → X2O4(g)X2O4 has a structure ΔHof of O(g) is 249 kJ/molΔHof of X(g) is 474.5 kJ/molΔHof of X2O4(g) is 29 kJ/molThe X-X single bond energy is 160. kJ/molUse the above data to estimate the average  bond energy in X2O4. Give your answer to the nearest 1 kJ/mo

2. The amide linkage is the connection between amino acids in the primary structure of proteins; a representation of the linkage is shown to the right: R2 (note: R1 and R2 represent the carbon centers of the respective amino acids) R1 H The expected bond angle around the Nitrogen is ~109°; the experimentally determined angle is 123°. What does this suggest about the C- N bond? (hint: consider possible resonance structures)

Use the average bond enthalpies from Table 8.3 in your textbook to estimate ΔHΔH for the formation of CO2(g) by the following reaction:                                 CH4(g) + 2O2(g) --> CO2(g) +2H2O(g)

a)   The following reaction occurs in an open beaker: C2H5OH (g) --->  C2H4(g) +  H2O (g)         {Bond Energy  (kJ/mol): C-H = 415 ;   C-C = 345 ;   C-O = 350 ;   O-H = 464 ;   C=C = 611}i)    Calculate the ΔH0rxn for this reaction from the given bond energies.  kJ ii)   Is this reaction an open, closed or isolated system? iii)  Would you feel hot or cold if you were near this reaction when it occurred?        This is because (choose from I - V)  I.     the reaction is exothermic and absorbs energy from the surroundings. II.   the reaction is exothemic and releases energy to the surroundings. III.  the reaction is endothermic and absorbs thermal energy from the surroundings. IV.   the reaction is endothermic and loses heat to the surroundings. V.    the reaction produces steam which contains a lot of heat.

Which of the following bonds are polar? (a) B¬F,(b) Cl¬Cl, (c) Se¬O, (d) H¬I. Which is the moreelectronegative atom in each polar bond?

Bromomethane, CH;Br, is a very useful fumigant against a wide range of agricultural pests, from insects to the verticillium wilt fungus. Draw the Lewis structure of CH3Br.