A 1500 g sample of liquid water at 25.0 C is heated by the additional 16.800 J o

Question

A 1500 g sample of liquid water at 25.0 C is heated by the additional 16.800 J of heat. The final temperature of the water is ___ degree C. The specific heat capacity of liquid A)33.04 B) 16.96 C) -21.0 D) 27.68 E) 95.2 A gas originally at 27 degree C and 1.00 atm pressure in a 3.9 L flask is heated at constant volume until the temperature is 500 degree C. The new pressure of the gas is __ atm A) 2.58 B) 3.69 C) 39.6 D) 4 99 E) 7.80 A sample of a gas originally at 25 degree C and 20 atm pressure in a 2.5 L container is allowed to expand until the pressure is 8.5 atm and the temperature is 75 degree C. The final volume of the gas is A) 34.35 B) 2.84 C) 68 69 D) 0 6869 E) 6.869

Explanation / Answer

12)

when hydrocarbon burns, it releases CO2 and H2O

Answer: B

13)

use:

Q = m*C*(Tf-Ti)

16800 = 1500 * 4.18*(Tf - 25)

(Tf - 25) = 2.68

Tf = 27.68 oC

Answer: D

i am allowed to answer only 1 question at a time

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