Question

Pls help me!!!!!!!! Answer in order please.

Answer 1

Q. No. 1:
                a)  Endothermic

                b)  Exothermic

                c)  Endothermic

                d)  Exothermic

Q. No. 2:
                a)  Exothermic

                b)  Because heat is on product side (evolved to surrounding).

                c)  
                  
                          1400 Kj  =  was produced by 1 mole of C₂H₄
Then,
                          2100 Kj  =  will be produced by X moles of C₂H₄

Solving for X,
                          X  =  (2100 Kj × 1 mol)  ÷ 1400 Kj

                          X  =  1.5 moles of C₂H₄

                d)

                             3 moles of O₂ produced  =  1400 Kj of Heat
Then,
                      1.5 moles of O₂ will produce  =  X Kj of Heat

Solving for X,
                                        X  = (1.5 mol × 1400 Kj) ÷3 mol

                                        X  =  700 Kj of Heat