If more ice at 273 K is added to an ice-water mixture at equilibrium, A) the tem

Question

If more ice at 273 K is added to an ice-water mixture at equilibrium, A) the temperature of the mixture will increase somewhat. B) the vapor pressure of the water will decrease. C) the temperature of the mixture will decrease somewhat. D) the vapor pressure of the water will rise. E) the temperature of the mixture will remain constant. A reaction rate is 6.0 times 10^-4 s^-1 at 10 degree C. If you raise the temperature up to 40 degree C, what is the new reaction rate (assuming general rule of thumb that a 10 degree C rise in temperature causes a reaction rate to double)? A) 3.6 times 10^-7 s^-1 B) 1.2 times 10^-3 s^-1 C) 2.4 times 10^-3 s^-1 D) 4.8 times 10^-3 s^-1 E) 9.6 times 10^-3 s^-1

Explanation / Answer

Q26

The temprature of mix will remain constant

since water is at 273 k and ice is also at 273 k, therefore no heat exchange via temperature gradient

Q27

Apply raise in T:

10 = 20, Knew = 2*6*10^-4

20 = 30, Knew = 2*2*6*10^-4

30 = 40, Knew = 2*2*2*6*10^-4 = 48*10^-4

so

choose D

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