Standard enthalpy of vapourisation for is . Heat required for vapourisation of 284 g of at constant temperature is kJ. (Given molar mass in ; C = 12, Cl = 35.5)

Round off your answer to the neares

Question

Standard enthalpy of vapourisation for  is . Heat required for vapourisation of 284 g of  at constant temperature is  kJ. (Given molar mass in ; C = 12, Cl = 35.5)

Round off your answer to the nearest integer.

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Strategy:
 Determine the number of moles of  using its molar mass, then multiply by the molar enthalpy of vaporization.

Step 1: Calculate Molar Mass of 
.

Step 2: Calculate Moles
.

Step 3: Calculate Total Heat ()

.
Nearest integer: .

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