Question

A chemical reaction has reached equilibrium when A) the concentrations of reactants and products are equal. B) all reactants have been converted to products. all products have been removed from the reaction mixture. D) the catalyst has been used up. E) the rate of the forward reaction equals the rate of the reverse reaction. 6) An equilibrium in which all the components are gases is a A) heterogeneous equilibrium. D) homogeneous B) liquid C) catalytic E) reversible 7) The equilibrium constant for the formation of ammonia from nitrogen and hydrogen is 1.6x 102, What is the form of the equilibrium constant? (2 NH312 E) INH312 INH312 IN2113H2 INH312 C) INH3) B) A) D) IN21H2P IN21H23 IN21(H2) N21lH213 The reaction for the decomposition of PCls to chlorine and PCI3 is shown below. 8) PClslg) PCl3lg)+ Cl2(g) 0.10 M, what is the value of the 0.10 M, [Cl2] If the equilibrium concentrations are [PCI5] =1.0 M, [PCI3] equilibrium constant? E) 2.0x 10-2 D) 1.0x 102 C) 10x 10-2 B) 1.0 x 10-4 A) 1.0x 10-2 The equilibrium constant for the production of carbon dioxide from carbon monoxide and oxygen is Ke 2x 1011 This means that the reaction mixture at equilibrium is likely to consist of 9) B) an equal mixture of products and reactants. A) mostly starting materials. C) twice as much starting material as product. E) mostly products. D) twice as much product as starting material. EP 4

Answer 1

5) E) when sate of forward to rate of backward then equilibrium reaction is equal reaction is established. 6) D homogenous (since all the components are in same phase) N₂ +342 2NH3 k= [NH372 (N2] [Hz] K= {PUz] [2] = Ceces] 0.1*0.) = 10² A 10