Question

Name CHEM 1341008, fall 2019 ID Quiz 7A Take home All work must be shown and answer must have a box around it for full credit. Due 10-30 ot beginning of class. 1. Methane (CHa) combusts as shown in the equation below. If 3 moles of methane were used in the combustion, what would be the change in enthalpy (AH) for the reaction? CHa+2 O2- COaie+ 2 H20 AH-802 k 2. The specific heat of water is 4.184 J/gK. How many joules (U) of heat are required to heat 15 g of water from 19.00 "C to 35.00 "C? SP.i MAt 1009, 16 J 4.11 3. Find the heat of reaction for the following process: 3 FeCl2(s) Fe(s) + 2 FeCla(s) given that: Fe(s) + 2HCI(aq) FeCl (s) + H2(g) 2Fe(s)+ 6HCI(aq) 2FeCla(s)+3H:l8) AH-769 k AH-1,822 kJ 4. Use a standard enthalpies of formation values below to determine the change in enthalpy for each of these reactions. Reaction: NaOH(s) + HCl(g)NaCl(s) + H2O(g) AH: (kJ/mol) Compound NaOH(s) HCI(g) NaCl(s) -426.7 -92.3 -411.0 -241.8 H20(8)

Answer 1

-02KJ One male ४eq५ठट ome male me thane 3 male =-2406 kJ 3x-802 KkJ kmow that we m 6 AL 15g x4-184 l35-19) 1000-44

that know m.6 AL 153 4-184135-19) FeCl2is) H2 cg) AH= -169 kJ Fe taHCi Caa) CS 3 Feciz 3H2 AH: 769 X3 KJ t GHcl 3Fe CS) Laa) CS) -1822 le J + 6Hcl AK = R Fec13 +3H2 2 Fe CS) caa) (S) 3 Fec1r Fecs) 2Fe ci3 AH= (769x3) -1922 KJ =495 KJ
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