Question

What is the heat of sublimation for solid carbon dioxide (dry ice) if 100 grams of it sublimes at a constant pressure of 1 atm and absorbs 25.2 kJ of heat?

Answer 1

To calculate the heat of sublimation for solid carbon dioxide  dry ice , we can use the following formula:Heat of sublimation  H_sub  = Heat absorbed  q  / Mass of substance  m Given:Mass of dry ice  m  = 100 gramsHeat absorbed  q  = 25.2 kJFirst, we need to convert the heat absorbed from kJ to J  joules , since the heat of sublimation is usually expressed in J/g.1 kJ = 1000 JSo, 25.2 kJ = 25.2 * 1000 J = 25200 JNow, we can calculate the heat of sublimation:H_sub = q / mH_sub = 25200 J / 100 gH_sub = 252 J/gThe heat of sublimation for solid carbon dioxide  dry ice  is 252 J/g.