Reference no: EM132592061

Your instructor gives you a 100 g of dry ice (solid carbon dioxide) at -100 °C. Through the course of an experiment, you end up with 100 g of gaseous carbon dioxide at 0 °C. Answer the following questions based on this data. Assume that no heat is lost to the outside environment during the experiment. The specific heats for solid and gaseous carbon dioxide are 0.296 and 0.203 cal/g-°C respectively. Remember, carbon dioxide sublimes from solid to gas at -78.5 °C at one atmosphere. The heat of sublimation for carbon dioxide for this phase change is 141 cal/g.

(a) How much heat is required to change 100 g of dry ice at -78.5°C to 100 g of gaseous carbon dioxide at -78.5°C?

(b) How much heat is required to change 100 g of dry ice at -100°C to 100 g of gaseous carbon dioxide at 0 °C?

(c) How much heat is required to change 100 g of gaseous carbon dioxide at 0°C to 100 g of dry ice at -100 °C? Carefully explain your answer.