A Lab Assistant Drops a 400 $15.0 ^ { \circ } \mathrm { C }$

question 56

Multiple Choice

A lab assistant drops a 400.0-g piece of metal at 100.0°C into a 100.0-g aluminum cup containing 500.0 g of water at $15.0 ^ { \circ } \mathrm { C }$ In a few minutes, she measures the final temperature of the system to be 40.0°C. What is the specific heat of the 400.0-g piece of metal, assuming that no significant heat is exchanged with the surroundings? The specific heat of this aluminum is 900.0 J/kg ∙ K and that of water is 4186 J/kg ∙ K.

• A) 1900 J/kg ∙ K
• B) 2270 J/kg ∙ K
• C) 3300 J/kg ∙ K
• D) 3800 J/kg ∙ K
• E) 4280 J/kg ∙ K

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Definitions:

Temperate Deciduous Forest

Northern Hemisphere biome in which the predominant plants are broadleaf trees that lose their leaves in fall and become dormant during cold winters.

Coniferous Forest

A biome characterized by evergreen trees with needles and cones, such as pines, spruces, and firs.

Coral Reef System

A diverse underwater ecosystem characterized by reef-building corals. These systems are found in warm, shallow ocean waters and support a wide range of marine life.

Freshwater

Water that has a low salt concentration, commonly found in rivers, lakes, streams, and ponds.