# Exam1 - Exam#2 100 points total 1 A sample of aluminum...

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Exam #2 100 points total 1. A sample of aluminum requires 112 Joules to raise its temperature from 300 K to 350 K. How many moles are in this sample of aluminum? (The specific heat of aluminum is 0.9 J g -1 K -1 . (5 points) 2. 0.3 liters of an aqueous solution of hydrochloric acid (HCl) and 0.1 liters of an aqueous solution of sodium hydroxide (NaOH) are allowed to react in a constant pressure calorimeter. The temperature is observed to increase from 317 to 348 K. Calculate the enthalpy change for this reaction. (10 points) 3. Given the following data: CH 4 (g) + 2O 2 (g) -> CO 2 (g) + 2H 2 O(g) H = -802 kJ C(s) + O 2 (g) -> CO 2 (g) H = -394 kJ 2H 2 (g) + O 2 (g) -> 2H 2 O(l) H = -572 kJ Calculate H for the formation of 10 grams of methane from carbon and hydrogen gas (10 points)

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4. The frequency of a certain electromagnetic radiation is 3.28 x 10 14 s -1 . a. What is the wavelength of this radiation in nm? b. What is the speed of this radiation?
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Exam1 - Exam#2 100 points total 1 A sample of aluminum...

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