Question

32) The reaction of one mole of nitrogen gas with three moles of hydrogen gas releases 92 ) thermal energy to the surroundings. Which of the following is TRUE? A) This reaction has a negative enthalpy of reaction B) Complete reaction of two moles of nitrogen gas would release 184 kl of thermal energy this reaction. C) This reaction is exothermic. D) All of the above are true. E) None of the above are true. 33) How many grams of the excess reactant remain assuming the reaction goes to completion and that you start with 15.5 g of Na2S and 12.1 g CuSO4? Reaction: Na2S+CuSO4 --Na2SO4 + Cus A) 0.05 B) 5.92 C) 15.45 D) 9.58 E) not enough information 34) What is the complete ionic equation for the reaction of hydrochloric acid with potassium hydroxide? A) H++OHH20 B) H++Cl- +K++OH-2H*+02- +K++C- C) 2H+-2C1+K2++20H H20+K2+-201- D) H*+Cl+K+OH H 20+K++CI- E) none of the above 35) What are the coefficients for the following reaction when it is properly balanced? _Na3PO4+ __Ba(NO3)2- _NaNO3 + __Ba3(PO4)2 A) 2,3,6,1 B) 2, 1, 1,3 C) 6,1,3,2 D) 2,3, 1,6 E) none of the above

Answer 1

2 NH3 N2 + 3H2 Imole 3 mole AH=-92kJ Imole Nz completely react to release q2 1C) =-2 mole we will react to relese 189 1 Enthalpy changes are reactes o exo there - Answer: 1) All of the above are hue Nazsoy tus Na2S + Cusoy According to 78.0459 .61 g balanced viaction. Given! 15:59 12:19 =) 159.619 Cuson react Cemplity code toro4sg mazs - 12.19 Cuson will react with : 78.045×12-1 g was 159-61 = 5.916 g Wazs Amount af Nars left = 15-5-5-916=9-5839 - Answer: (D) 9.589

34 Hellas & Naokas > Nall of thao & 7 has to teas & Water on gut not ante las + H202 а не + on a) - 29 ) - greы: A) нон - HD, 6 NaNO3 + Baz (Pou) - 2N93 Boy + 3 Ba(NB) :- Answer: A) 2, 3, 6, 1