Assignment Instructions/ Description
Part 3 v 1 chem 051 Image transcription textCh3
1. Which of the following is a chemical change?
A) burning natural gas
B) melting ice
C) hammering gold into foil
D) cutting a tomato
E) cutting paper
2. On a hot day, the thermometer read 95 F. What is the temperature in degrees Celsius?
A) 77 . C
B) 113 .C
C) 35 .C
D) 63 .C
E)
178 .C
3. A burn from steam at 100 C is expected to be more severe than a burn from boiling water at
100 'C because
A) the steam is hotter than the boiling water
B) there is more steam than water
C) the steam will give off a large amount of heat as it condenses
D) you are more likely to come into contact with the steam than with the boiling water
4. The specific heat of copper is 0.0920 cal/g .C, and the specific heat of silver is 0.0562
cal/g .C. If 100 cal of heat is added to one g of each metal at 25 .C, what is the
expected result?
A) The copper will reach a higher temperature.
B) The silver will reach a higher temperature.
C) The two samples will reach the same temperature.
D) The copper will reach a temperature lower than 25 .C
5. Calculate the total heat, in soules, needed to convert 15.0 g of liquid ethanol at 45.0 .C to gas
at its boiling point of 78.0 .C. Ethanol has a specific heat of 2.46 J/g "C and a heat of
Vaporization of 841 J/g.
A) 14600 J
B) 14200 J
C) 13800 J
D) 24600 J
34200 J
E)... Show more