29, Use the information in the box to determine /\" for the reaction: CH4(g) + 2

Question

29, Use the information in the box to determine /" for the reaction: CH4(g) + 2 Cla(g) CH2Cl2(g) + 2HCl(g) 2CH3Cl(g) +2HCl(g) 2CH4(g) + 2Cl2(g) HCl(g) HP = 196 kJ CHCI(g) + Ch(g) CH2Clz(g) + a. 92 k b. -300 kJ c. +300 k d. -202 kJ The reaction HCI(aq) + KOH(aq-KCI(aq) + H2O() takes place when 25.0 mL of 0.525 M HCI(aq) is added to 25.0 mL of 0.525 M KOH(aq). If the reaction solution increases in temperature from 25.2 to 38.5 , what is H n kl/mol for the reaction? Assume the density of the solution is 1.00 g/mL and its heat capacity is 4.18 J/g°C a. 2.78 kJ/mol b. -2.78 kJ/mol c. 212 kJ/mol d. -212 kJ/mol 30. 31, Calculate He for using the following information: r(CH4(9)) =-78.4 kJ/mol, aH7(CO2(9))--393.5 kJ/mol, aH7(H20()) =-285.8 kJ/mol. CH4(g) + 2 Olg) CO2(g) + 2 H20( a. +886.7 kJ b. -886.7 k c. -600.9 k d. -757.7 k 32. For the process H2O(g) H2O(), which one of the following is true: a. it is endothermic. b. it occurs with no change in enthalpy c. it occurs with decreasing entropy.

Explanation / Answer

29.

We can determine the delta H of given reaction by using Hess

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