F11_Exam%203%20review

F11_Exam%203%20review - CHEM101 EXAM REVIEW CHEM101 EXAM 3...

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HEM101 EXAM 3 REVIEW CHEM101 EXAM 3 REVIEW - take any clicker from cart
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How much energy is needed to raise the temperature f 454 g tin from 25° to its melting point 231 9° of 454 g tin from 25 C to its melting point, 231.9 C, and then melt the tin? (the specific heat of tin is 0.227 J g 1 °C 1 ; the heat of fusion is 59.2 J g -1 ) 53% 1. 48.2 J . .13 × 0 4 36% 2. 2.13 10 J 3. 2.69 × 10 4 J 82 0 4 4. 4.82 × 10 J 5. 5.58 × 10 6 J % 9% 1 2 3 4 5 1% 1%
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Consider the following thermochemical equation: H ) + I ) CH (g)+HI(g) Δ +23 kJ CH 4 (g) + I 2 (g) CH 3 I (g) + HI (g) H = +23 kJ What energy change occurs when 2.4 mole of CH 4 reacts? 76% 1. 23 kJ is released. 2. 23 kJ is absorbed. 3. 55 kJ is released. 4. 55 kJ is absorbed. 6 kJ is absorbed 1% 6% 2% 14% 5. 9.6 kJ is absorbed. 1 2 3 4 5
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What mass of CH 4 (g) must be burned to lease 334 k f heat to the surroundings? release 334 k J of heat to the surroundings? CH 4 (g) + 2O 2 (g) CO 2 (g) + 2H 2 O (l) Δ H° = 890 k J 63% 1. 0.426 g 2. 6.00 g 3. 0.375 g 4. 2.66 g 5. 55.6 g 10% 4% 13% 10% 1 2 3 4 5
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The value of Δ H° for the reaction below is +128.1 kJ: H H (l) CO (g) + 2H ) CH 3 OH (l) CO (g) 2 H 2 (g) What is the value of Δ H° for the following reaction?
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This note was uploaded on 01/15/2012 for the course CHEMISTRY 101 taught by Professor King during the Spring '11 term at Drexel.

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F11_Exam%203%20review - CHEM101 EXAM REVIEW CHEM101 EXAM 3...

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