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apch06_pt06 - South Pasadena AP Chemistry Name Period Date...

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South Pasadena • AP Chemistry Name _________________________________ Period ___ Date ___/___/___ 6 • Energy and Chemical Reactions P R A C T I C E T E S T 1. How many joules are equivalent to 37.7 cal? a) 9.01 J c) 1.51 J b) 4.184 J d) 158 J 2. The quantity of heat that is needed to raise the temperature of a sample of a substance 1.00 degree is called its 3. Equal masses of two substances, A & B, each absorb 25 Joules of energy. If the temperature of A increases by 4 degrees and the temperature of B increases by 8 degrees, one can say that a) the specific heat of A is double that of B. b) the specific heat of B is double that of A. c) the specific heat of B is negative. d) the specific heat of B is triple that of A. 4. If 25 J are required to change the temperature of 5.0 g of substance A by 2.0 C, what is the specific heat of substance A? 5. How much energy is required to change the temperature of 2.00 g aluminum from 20.0 C to 25.0 C? The specific heat of aluminum is 0.902 J/g C.
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