Problem

Using Table and the specific heat of water, 4.184 J/g °C, calculate the total amount of he...

Using Table and the specific heat of water, 4.184 J/g °C, calculate the total amount of heat for each of the following:

a. joules to condense 125 g of steam at 100 °C and to cool the liquid to 15.0 °C


b. joules needed to melt a 525-g ice sculpture at 0 °C and to warm the liquid to 15.0 °C


c. kilojoules released when 85.0 g of steam condenses at 100 °C, the liquid cools to 0 °C, and freezes


d. joules to warm 55.0 mL of water (density = 1.00 g/mL) from 10.0 °C to 100 °C and vaporize it at 100 °C

Table

 

Heats of Fusion and Heats of Vaporization for Selected Substances

Liquid

Formula

Melting point (°C)

Heat of Fusion (J/g)

Boiling point (°C)

heat of Vaporization (J/g)

Water

H2O

0

334

100

2260

Ethanol

C2H5OH

−114

109

78

841

Ammonia

NH3

−78

351

−33

1380

Acetone

C3H6O

−95

99.3

56

335

Acetic acid

C2H4O2

17

192

118

390

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