1. (20) A fractured reservoir consists of matrix blocks of dimensions 1 mx 1 mx 0.5 m. An operator begins to flood the fracture system with steam and he estimates that at time t=0 the surfaces of the blocks near an injection well are raised instantaneously from the initial, uniform temperature of 120F to 300F. What would be the temperature of the center of a block after 6 hours. Properties of matrix blocks are listed below: => 6 block T? p = 2,270 kg/m, k = 2.61 J/(m-s-K), Cp = 1,000 J/(kg-K) 1 m T = 120F att = 0 1 m 0.5 m