Answer to Question #185481 in General Chemistry for Gabriel Gillard

Question

A piece of copper at 95.3 °C is placed in a calorimeter containing 34.5 grams of water at 22.7 °C. If the temperature at equilibrium is 28.9°C, what is the mass of the copper? The specific heat of copper is 0.385 J/(gC).

Answer 1

q= mc∆T

q_water + q_copper = 0

q_water = -q_Cu

34.5 × 4.184 × (28.9 -22.7) = -(m × 0.385 × (28.9-95.3)

894.95 = 25.564m

= 35.126g