Chemistry, 15.07.2020 01:01 tlturner03
Predict whether each of the following transformation leads to an increase or decrease in the entropy of a system.
DO THE FOLLOWING DECREASE OR INCREASE IN ENTROPY
a- Br2(l) to Br2(g)
b- I2(g) to I2(s)
c- higher density S(a) to lower density S(B)
d- C (graphite) to C (diamonds)
e- NaCl(s) to NaCl(aq)
Answers: 1
Chemistry, 21.06.2019 18:30
Calculate the change in entropy if br2(l) is converted into gaseous br atoms. s° for br2(l) = 152.2 j/(mol•k) s° for br2(g) = 245.5 j/(mol•k) s° for br(g) = 175.0 j/(mol•k)
Answers: 2
Chemistry, 22.06.2019 01:00
Consider three unlabeled bottles, each contain small pieces of one of the following metals. - magnesium - sodium - silver the following reagents are used for identifying the metals. - pure water - a solution of 1.0 molar hcl - a solution of concentrated hno3 (a) which metal can be easily identified because it is much softer than the other two? describe a chemical test that distinguishes this metal from the other two, using only one of the reagents above. write a balanced chemical equation for the reaction that occurs. (b) one of the other two metals reacts readily with the hcl solution. identify the metal and write the balanced chemical equation for the reaction that occurs when this metal is added to the hcl solution. use the table of standard reduction potentials (attached) to account for the fact that this metal reacts with hcl while the other does not. (c) the one remaining metal reacts with the concentrated hno3 solution. write a balanced chemical equation for the reaction that occurs. (d) the solution obtained in (c) is diluted and a few drops of 1 m hcl is added. describe what would be observed. write a balanced chemical equation for the reaction that occurs.
Answers: 2
Chemistry, 22.06.2019 22:30
Which is a characteristic of the electron sea model for metallic bonding? molecular orbitals overlap to produce bands. electrons flow easily between metal nuclei. electrons are in fixed positions in the orbitals. atomic nuclei are arranged in an irregular pattern.
Answers: 3
Predict whether each of the following transformation leads to an increase or decrease in the entropy...
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