Everything else being equal, write a general expression to show how the exchange current density for a reaction changes as a function of temperature. In other words, write an expression for j0(T) at an arbitrary temperature T as a function of j0(T0) at a reference temperature T0. If a reaction has j0 = 10-8 A/cm2 at 300K and j0 = 10-4 A/cm2 at 600K, what is ∆G1 + + for the reaction? Assume that the T0 is 300K.

Adouble-strand no. 60 roller chain is used to transmit power between a 13-tooth driving sprocket rotating at 300 rev/min and a 52-tooth driven sprocket. a) what is the allowable horsepower of this drive? b) estimate the center-to-center distance if the chain length is 82 pitches. c) estimate the torque and bending force on the driving shaft by the chain if the actual horsepower transmitted is 30 percent less than the corrected (allowable) power.

Water at 55c flows across a flat plate whose surface temperature is held constant at 95c. if the temperature gradient at the plate's surface for a given value of x is 18 c/mm, find a) local heat transfer coefficient. b) heat flux

An engine runs on the ideal diesel cycle. the cycle has a compression ratio of 20 and a cutoff ratio of 2. the highest temperature in the cycle is 1200 k. if the heat into the system is 300 kj/kg of working fluid and using variable specific heats determine the work produced per mass of working fluid