# Problems

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2
Science of Matter (CHEMACTIVITY: Specific Heat Practice Problems)
How Do Scientists Describe and Classify Matter?
2 – Mastered
1 – Not Yet Mastered
0 - Incomplete
1. Liquid water has a specific heat capacity of 4.184 J/g&deg;C (or 1.00 cal/g&deg;C). What does this mean?
2. Calculate the energy (in joules) required to raise the temperature of 3.50g of water by 18.5&deg;C.
3. Convert the answer to question #2 into kilocalories:
4. If 72.4 kJ of heat is applied to a 952.0g block of metal, the temperature of the metal increases by
10.7&deg;C. Calculate the specific heat of the metal (J/g&deg;C)
5. If 385J of energy was required to heat a block of aluminum from 27.2&deg;C to 41.5&deg;C, what was the
mass of the aluminum block (in grams)? (The s value for Aluminum is 0.89J/g&deg;C)
6. If the temperatures of separate 25.0g samples of silver and mercury are to be raised by 20.0&deg;C, how
much heat in calories must be added to each substance? (HINT: You will need to use Table 10.1 on
p. 329)
7. What is the relationship between a substance’s specific heat capacity and its “ability” to change
temperature given a certain quantity of energy?
Essential Content and Skills:
How do we describe, both conceptually and mathematically, the concept of specific heat capacity?
How do we correctly re-arrange the specific heat formula to solve for any of its four variables using algebra?
How do we correctly calculate the specific heat capacity of an object, given appropriate data, to the correct number of SigDigs?
How can we correctly identify substances based on their calculated specific heat capacity values?
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