Author Question: For the freezing of liquid bromine, Br2, at a given temperature and pressure, A) H is negative ... (Read 89 times)

berenicecastro · **on:** Aug 27, 2018

For the freezing of liquid bromine, Br2, at a given temperature and pressure,

A) H is negative and S is negative.
B) H is negative and S is positive.
C) H is positive and S is negative.
D) H is positive and S is positive.

Question 2

The density of ethanol, C2H5OH, is 0.789 g/mL. How many milliliters of ethanol are needed to produce 10.0 g of CO2 according to the following chemical equation? C2H5OH(l) + 3 O2(g) 2 CO2(g) + 3 H2O(l)

A) 4.12 mL
B) 6.63 mL
C) 13.2 mL
D) 26.5 mL

Question 3

The acidic water of a lake (V = 4 108 L) must be neutralized with lime, CaO. It will require a minimum of ______ grams of lime to adjust the pH from 5.6 to 6.5.

A) 2 104
B) 5 104
C) 1 105
D) 3 104
E) 5

jasonq · **Reply #1 on:** Aug 27, 2018

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