An insulated calorimeter is used to dissolve 20.0 g of sodium hydroxide in 180.0 g of water. The water temperature increased from 20.0ºC to 46.6ºC. a) find the kilojoules of heat gained by the water
b) is the reaction exothermic or endothermic?

What would be the original temperature of a gas that has a volume of 2.0 l and a pressure of 2.0 atm and an unknown temperature that the volume increased to 3.5 l in its pressure decreased to 1.0 atm if the final temperature is measured to be 11°c