Seven liters of a fluid with a specific heat of 2.93 kJ/(kg x K) or 0.700cal/(g x K) at 20C is mixed with three liters of the same fluid at 32C. Assume that the fluid is insulated thus that no energy can flow into it or out of it. Evaluate what is the final temperature of the fluid? You don't know the density of the fluid, but you do know that the density is constant over this temperature range.