8. Specific heat of Cu-0.377 J/gc Specific heat of Al-0.8os Jgc To raise the tem

Question

8. Specific heat of Cu-0.377 J/gc Specific heat of Al-0.8os Jgc To raise the temperature of25.0 grams of these metals by S0 C; a both metals require the same amount of heat b. Cu requires more heat energy than Al does c. Al requires more heat energy than Cu does d not enough data given to answer 9. A5.00 g sample of a brownie was burned in a bomb calorimeter containing 2025 gof water, The temperature ofthe water increased from 23.50°C to 33.47°C, How much heat, in joules, did the brownie release when it burned? [Cwater 4.184 J(g C)] a. 1.99 x 10J b. 2.80 x 103 c 4.92x10 J d 8.45 x 104J e. 7.00 x 10 10. Methylhydrazine, CHON2. is commonly used as a liquid rocket fuel. The heat of combustion of methylhydrazine is-1.30 x 10 ' J/mole. How much heat is released when 100.0 g of methylhydrazine is burned?

Explanation / Answer

8)

Q = m*C*delta T

so, when m and delta T are same, the one with greater value of C will require greater heat

C is specific heat

C is more for Al. So, Al requires larger heat

Answer: c

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