Ethyl chloride,C₂H₅Cl,is used as a local anesthetic.It works by cooling tissue as it vaporizes;its heat of vaporization is 26.4 kJ mol^-1.How much heat could be removed by 20.0 g of ethyl chloride?

Question

Quizplus · Accepted Answer

To find the heat removed by 20.0 g of ethyl chloride, we first calculate the moles of ethyl chloride using its molar mass. The molar mass of ethyl chloride (C2H5Cl) is approximately 64.5 g/mol (12*2 + 1*5 + 35.5). Then, we use the heat of vaporization (26.4 kJ/mol) to find the total heat removed.Moles of ethyl chloride = 20.0 g / 64.5 g/mol = 0.310 molHeat removed = 0.310 mol * 26.4 kJ/mol = 8.184 kJTherefore, the correct answer is 8.19 kJ, as it is the closest value to our calculation.

Ethyl Chloride,C2H5Cl,is Used as a Local Anesthetic

Ethyl Chloride,C₂H₅Cl,is Used as a Local Anesthetic