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Category > Applied Sciences Posted 28 May 2017 My Price 5.00

What are the units of the rate constant?

For a gas reactionat 400K, therate is reported as-dpA/dt = 3.66 pA2, atm/hr.a) What are the units of the rate constant? b)Whatisthevalueofrateconstantforthereactioniftherateequationisexpressedas-rA= - (1/ V) dNA/dt = kCA2, mol/liter-hrAnswer: (a) The unit for rate constant isk = 3.66 = - (dpA/dt) / pA2= (atm/hr) / (atm)2= 1/atm-hr or atm-1hr-1(b) We know, pA= CAR T or dpA= (RT) dCA. Then, the given expression becomes- (RT) dCA/dt = 3.66 (CAR T)2or-dCA/dt = (3.66 R T)CA2or-rA= - (1/ V) dNA/dt = - dCA/dt = (3.66 R T)CA2.Oncomparing,weget‘k’=3.66RT= 3.66 (0.0820575) (400) = 120.1322lit/mol-hr

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Alpha Geek
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Status NEW Posted 28 May 2017 10:05 AM My Price 5.00

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file 1495966422-Answer.docx preview (188 words )
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