If 226 g of water is contained in a 311 g alu- minum vessel at 11◦C and an additional 92 g of water at 91◦C is poured into the container, what is the final equilibrium temperature of the mixture? The specific heat of aluminum is 900 J/kg · ◦C and of water 4186 J/kg · ◦C .
Answer in units of ◦C.