A cylindrical copper rod of length 0.25 m and cross-sectional area 1.2 cm² connects a hot reservoir at 150 °C to a 200 g portion of water that has just finished melting from ice at 0 °C. The water is confined so it stays well mixed. Given the thermal conductivity of copper is 390 W/m·°C and the specific heat of liquid water is 4.2 J/g·°C, estimate the time, in seconds, required for the water’s temperature to rise from 0 °C to 5.0 °C. Neglect all other heat exchanges.