Question

Part A IN gams: In an experiment, a 0.270-kg piece of ceramic superconducting material at 17 °C is placed in liquid nitrogen at its boiling point (−195.8 °C) to cool. The nitrogen is in a perfectly insulated flask that allows the gaseous N2 to escape immediately. How much mass of liquid nitrogen will be boiled away? (Take the specific heat of the ceramic material to be the same as that of glass.)

Part B In m/s: A 85.0-gram lead bullet hits a steel plate, both initially at 23 °C. The bullet melts and splatters on impact. Assuming that the bullet receives 84% of its kinetic energy as heat energy, at what minimum speed must it be traveling to melt on impact? (The melting temperature of Lead is 327°C)

Part C: Steam at 100 °C is bubbled into 4.20 kg of water at 30 °C in a calorimeter cup. How much steam will have been added when the water in the cup reaches 65 °C? (Ignore the effect of the cup.)

Answer 1