What amount of heat energy would be necessary to raise the temperature of 50 g of water at room temperature (25 °C) to the boiling point (100 °C)? The specific heat of water is 1.0 cal/g
°C.

Alidded glass container is filled with a colored gas. after a period of time, it is observed that the gas is uniformly spread throughout the box and that the movement has slowed considerably. next, a warm iron plate is carefully placed under the box. why is there resumed movement of the gas in the container?