Question

1) A certain substance has a heat of vaporization of 36.02 kJ/mol.36.02 kJ/mol. At what Kelvin temperature will the vapor pressure be 3.503.50 times higher than it was at 347 K?

2) A total of 767 cal767 cal of heat is added to 5.00 g5.00 g of ice at −20.0 °C.−20.0 °C.

What is the final temperature of the water?

Specific heat of H2O(s)H2O(s) | 2.087 J/(g⋅°C)2.087 J/(g⋅°C) |
---|---|

Specific heat of H2O(l)H2O(l) | 4.184 J/(g⋅°C)4.184 J/(g⋅°C) |

Heat of fusion for H2OH2O | 333.6 J/g333.6 J/g |

Answer #1

803 cal of heat is added to 5.00 g ice at –20.0 °C.
What is the final temperature of the water?
SPecific heat H2O(s)= 2.087 J/(g*C)
Specific heat H2O(l)=4.184 J/(g*C)
Heat of fusion= 333.6 J/g

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