Question

both question are about zero and second order reaction

rear, of 50The decomposition of R at 33°C is a zero-order reac- tion. It takes 128 minutes to decompose 41.0% of an intial mass of 739 mg at 33°C. At 33°C, (a) what is k? (b) what is the half-life of 739 mg? (c) what is the rate of decomposition for 739 mg? (d) what is the rate of decomposition if one starts with n an initial amount of 1.25 g? -ug?

Answer 1

The key concept is in a zero order reaction the rate constant does not depend on initial concentration,it is constant for a reaction.
60 naitial mal = 739 mg . – given date it is a zuo- order reaction, t. of reaction constant = k. - dp = K - P = fk et P = Kt alt (a) Ke Plt - K=.41 x 739 tince 410% of R de composed 02 й. -) K2 2.36 mg / min I (6) P= kx the - 739 = 2: 38 x 12t1/2 = 1 + 236 - ty = 156.56 min 1 R= dl = K = 2.36 my min (d) Rate of reaction du esant change, because it does not depend upon initial concentration

5D HIG H G) + $ 170 d H I = K - HI; - Hip = K & HI; - HIP ot -) 0.2 K os atm/ul - K= almler 0.8 6) K = 0.05 atm/see b) 01150 - 0.0432-K ) to 0.1008 = 2.136 sle 0.05 o at half life presun of MI will be 0.s atma 0.025 0.25 atm 0.5-0.85 k » ORS - Hy i ty a 5 see