noun
1
BAD : This type of job requires special capacities.
GOOD : This type of job requires special skills.
BAD : I wish to improve my speaking and listening capacities.
GOOD : I wish to improve my speaking and listening skills.
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capacity = the power or quality that makes someone able to do, experience, give or receive something: 'These children display an extraordinary capacity for learning.' 'Man's capacity for love and generosity is unlimited.'
skill = what someone needs to have learned before they can actually do a particular job or activity: 'Being a good manager requires a number of highly specialized skills.' 'This course is designed to develop the student's reading and writing skills.'
2
BAD : The atomic bomb has given man the capacity of self-destruction.
GOOD : The atomic bomb has given man the capacity for self-destruction.
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capacity for sth 'He has an enormous capacity for hard work.'
capacity to do sth: 'The human race shows an extraordinary capacity to change with the times.'