What is the clausius-clapeyron equation, explained simply

Not sure how much help i can be, but the above equation can be used to estimate vapor pressure at a given temperature. generally, it shows the relationship between temperature and vapor pressure. i think the difficult thing to understand about it is when they start talking about 'phases' and 'enthalpy of vaporization', but worry not. in basic terms, this equation is saying 'i have a vapor which at this temperature, is a known pressure. if i add the right amount of energy (the enthalpy of vaporization bit) creating a new temperature, substitute these values in to find the new vapor pressure. 

Read the sentences below in 1962, i tried to enroll as the first black student at the university of mississippi. the governor of mississippi blocked my entrance which best describes the verbs used in the sentences? o they are past tense verbs, which are often used in narrative essays o they are past tense verbs, which are not often used in narrative essays. o they are future tense verbs, which are often used in narrative essays o they are future tense verbs, which are not often used in narrative essays.