Question
please help fast!
A) 1.70 . 10-5 k B)-1.70 . 105 kJ C)248 kJ D)-1.10 kJ 28. Determine ta, for the reaction descried by the chemical equation given the folowing tt values {in kJrnor': CaCOds).-1206 9, Ca0(s),-6356, CO2(g).-39 CO2(g)-393.5. A) 813.4 k.J molt B) 177.8 kJ mor C) 2236.0 kJ mor Di-964 8 mor 29. Use average molar bond energies to estimate &Hs; for the equation Given the following Hoend vakues on kmol: H-H 43 NEN 945, NH 390 A) 83 kJ mof B)-990 kJmol c)-90 k3mor D) 1080 kJ mor" 3112(g) + Nag) 2 NHig) 30. The specfic heat capacity of siver is 0 24 Jg C, What amount of energy is required to raise the temperature of 12.4 grams of siver from 20 C to 35 C at constant pressure? C) 45 J 0)34J A) 0.24J B) 17 J
Explanation / Answer
28.
For a reaction;
dH = Hfinal - Hinitial
HRXN = Hproducts - Hreactants
HRXN = -635.5 + -393.5 - (-1206.9)
HRXN = 177.9 kJ/mol
