Processes are always spontaneous when__(H and S refer to the system). Delta H >
ID: 1021200 • Letter: P
Question
Processes are always spontaneous when__(H and S refer to the system). Delta H > 0 and Delta S 0 and Delta S 0 and Delta S 0 and Delta S 0, then when the reaction is at equilibrium there will be___absolutely no B that is formed smaller quantities of B and larger quantities of A. equal quantities of A and B. large quantities of B and smaller quantities of A. absolutely no A remaining. For the reaction 2A + 3B rightarrow 4C + 5D, the rate of the reaction in terms of Delta B would be written as____- Delta B/Delta t +Delta B/Delta t -1/3 Delta B/Delta r + 1/3 Delta B/Delta r -3 Delta B/Delta r In the combustion of methane. CH_4(g) + 2 O_2(g) rightarrow CO_2 (g) + 2 H_2O (g), which restart has the greatest rate of disappearance? CH_4 O_2 CO_2 H_2O CH_4 and O_2 have the same rate of disappearance. Which of the following docs the initial rate of a chemical reaction depend on? Concentration of reactants Concentration of products Temperature I III II Both I and III I, II, and III For the rate law Rate = k[A][b]^1/2, the partial order with respect to A is__. the partial order with respect to B is_, and the total order is_. 0; 1/2; 1/2 1; 1/2; 1 1; 1/2; 3/2 1; 1/2; 5/2 The orders cannot be determined without a chemical reaction.Explanation / Answer
9. A process is said to be spontaneous when delta S is positive and delta H is negative. So, correction option is d.
11. 2A+ 3B ---> 4C + 5D
Rate of reaction is the change of concenteration with respect to time. As B is a reactant and its concenteration is decreasing with time. So, minus sign indicates the decreasing concenteration.
So, rate is -1/3 delta B/t.
Correct option is d
12. In combustion of methane, O2 has greater rate of disapperance. correct option is b
Rate of disperance =-CH4/t = -1/2 O2/dt
13. Initial rate of reaction depends upon the concenteration of the reactants. When the reaction starts, there is only reactant in the vessel and no product. so rate of reaction depends on the concenteration of the reactants.
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