Answer to Question #145584 in General Chemistry for jack

Question

a glass of water with a volume of 250 mL and a temperature of 12 degrees Celsius. He add a piece of dry ice, CO2(s), which has a mass of 25 g, to cool down his water. If dry ice has an enthalpy of sublimation of 25.2 kJ/mol, calculate the final temperature of the water after the dry ice has fully dissolved

Answer 1

glass of water with a volume of 250 mL

temperature of 12 degrees Celsius.

CO2(s), which has a mass of 25 g,

enthalpy of sublimation of 25.2 kJ/mol,

Temperature = 12^OC

CO₂ = mass = 25g

E^o =25.2kj/ mol

1 mol of CO₂ = 44.01g/ mol

? = 25g

(44.01/25)g = 1.760moles

(25.2/ 1.7604) = 14.3^OC