The temperature of a city was found to be `-9.3^@C.` A car was used, whose radiator was filled with 5 L of water. What quantity of antifreczing agent ethylene glycol were added to water of radiator in order to use the car for travelling? `("K of water 1.86 K kg mol"^(-1))`

Options

A. 3200g
B. 1670g
C. 1550g
D. 2100g

Answer

C

Explanation

To use car, `Delta T_(f)= T_(f)^(@)- T_(f)= 9.3K`
`therefore Delta T_(f)= K_(f) m rArr 9.3 =1.86m rArr m=5`
`therefore` number of moles of ethylene glycol added to 5L of water of radiator `=5xx 5=25 or 25 xx 62 rArr 1550g`