Project #26493 - chemistry (high school)

heat capacity (CP) is defined as the amount of energy (heat) is takes to raise the temperature of 1 gram of  something 1 °C.

A cup of water at 25 °C is heated to 90 °C to make a cup of tea.  How much energy (J) does it take to raise the temperature?

A bathtub filled with 1000 liters at 25 °C is heated to 30 °C.  How much energy (J) is required?

How much energy does it take to raise the temperature of a 2,500,000 (1 x 106 mL) Liter Olympic size swimming pool 1 °C?

Aluminum has a specific heat capacity of 0.90 J/(g*°C).  If a sample of aluminum with an unknown mass is exposed to 2300 J of heat and the temperature rises from 30 °C to 300 °C, how many grams is the sample?

A 72 g sample of silver cools from a temperature of 1000 °C to 28 °C.  How many joules of energy are released during this cool down?  The specific heat of silver is 0.24 J/(g*°C).

How much heat is absorbed when 500 g of water goes from 25.0 °C to 35.0 °C?

How much heat is absorbed when 500 g of copper goes from 25.0 °C to 35.0 °C? The heat capacity of copper is 0.385 J/(g*°C).

How much heat is released when 150 g of iron cools from 525 °C to 100 °C?  The heat capacity is 0.44 J/(g*°C).

A 50.0 g block of glass (Cp = 0.50 J/(g*°C)) absorbs 333 joules of heat energy.  How much does the temperature of the glass rise?

The temperature of a silver coin (Cp = 0.24 J/(g*°C)) falls by 353 °C as it releases 5,550 Joules of heat.  What is the mass of the coin?

An aluminum can with a mass of 12.5 grams (Cp = .90 J/(g*°C)) absorbs 245 Joules of heat.  How much does the temperature rise?

Is mercury (Cp = 0.14 J/(g*°C)) or silver (Cp = 0.24 J/(g*°C)) a better conductor of heat? Explain.

The specific heat capacity of water is a whopping 4.184 J/(g*°C). What does this really mean? Why did I place the term “whopping” into this statement?

 Subject Science Due By (Pacific Time) 04/01/2014 12:00 am
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