The heat of fusion of cobalt at its normal melting point of 1495°C is 15.5 kJ/mol, while its heat of vaporization at its normal boiling point of 3097°C is 389.1 kJ/mol. (a) Use these data to calculate the heat of sublimation for Co. ____kJ/mol Is your answer precise or is it approximate? (b) At 298 K, the standard heat of formation of Co(s) is 0 kJ/mol while the standard heat of formation of Co(g) is 424.7 kJ/mol. Use this to calculate the heat of sublimation of cobalt. ____kJ/mol. Is your result for part (b) larger or smaller than the value calculated in part (a)?
The heat of fusion of cobalt at its normal melting point of 1495°C is 15.5 kJ/mol, while its heat of vaporization at its normal boiling point of 3097°C is 389.1 kJ/mol. (a) Use these data to calculate the heat of sublimation for Co. ____kJ/mol Is your answer precise or is it approximate? (b) At 298 K, the standard heat of formation of Co(s) is 0 kJ/mol while the standard heat of formation of Co(g) is 424.7 kJ/mol. Use this to calculate the heat of sublimation of cobalt. ____kJ/mol. Is your result for part (b) larger or smaller than the value calculated in part (a)?
Chemistry: An Atoms First Approach
2nd Edition
ISBN:9781305079243
Author:Steven S. Zumdahl, Susan A. Zumdahl
Publisher:Steven S. Zumdahl, Susan A. Zumdahl
Chapter9: Liquids And Solids
Section: Chapter Questions
Problem 98E
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The heat of fusion of cobalt at its normal melting point of 1495°C is 15.5 kJ/mol, while its heat of vaporization at its normal boiling point of 3097°C is 389.1 kJ/mol.
(a) Use these data to calculate the heat of sublimation for Co. ____kJ/mol
Is your answer precise or is it approximate?
(b) At 298 K, the standard heat of formation of Co(s) is 0 kJ/mol while the standard heat of formation of Co(g) is 424.7 kJ/mol. Use this to calculate the heat of sublimation of cobalt. ____kJ/mol.
Is your result for part (b) larger or smaller than the value calculated in part (a)?
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