Answer to Question #179063 in General Chemistry for geek

Question

Determine the amount of heat required to convert 500.0 g of liquid ethanol at 25.0°C into gaseous ethanol at 125°C. Use the following information on ethanol (CHOH) to calculate the amount of heat for each of the steps.

Melting Point = −117°C Boiling Point = 78.3°C

Molar Heat Capacities:

Cliquid =113 J/mol °C

Cgas = 420 J/mol °C

ΔHfusion = 5.02 kJ/mol

ΔHvaporization = 39.3 kJ/mol

a. 507.7 kJ

b. 493.7 kJ

c. 707.7 kJ

d. 642.7 kJ

Which of the following substances is the most viscous liquid?

a.C6H14

b. C12H26

c. C16H34

d. C8H18

Answer 1

a. 507.7 kJ

a.C6H14