Question

In an experiment, a 0.150 kg block piece of ceramicsuperconducting material at 20°C is placed in liquid nitrogen atits boiling point to cool in a perfectly insulated flask, whichallows the gaseous N2 immediately to escape. How many liters ofliquid nitrogen will be boiled away in doing this operation? (Takethe specific heat of the ceramic material to be the same as that ofglass, and take the density of liquid nitrogen to be800kg/m³)

Answer: 0.17 Liters