An unknown gas, DD, reacts with fluorine gas to form the compound DF4(g)DF4(g), as represented by the following equation. D(g)+2F2(g)→DF4(g)D(g)+2F2(g)→DF4(g) A series of experimental trials were performed at 600∘C600∘C to determine the rate law expression for the reaction. Data from the trials are shown below. Initial PDPD (torrtorr) Initial PF2PF2 (torrtorr) Initial Rate of Appearance of DF4(g)DF4(g) (torr/mintorr/min) Trial 1 3000 3000 2.50×10−22.50×10−2 Trial 2 6000 3000 5.00×10−25.00×10−2 Trial 3 3000 6000 10.0×10−210.0×10−2 (a) A student claims that the reaction is first order with respect to D(g)D(g). Do you agree or disagree? Justify your answer using the data above. (b) What is the initial rate of disappearance of F2(g)F2(g) in trial 1? Justify your answer. (c) A student claims that if element DD is in group 18, then the molecular geometry of DF4(g)DF4(g) is tetrahedral. Do you agree or disagree with the student? Justify your answer in terms of VSEPRVSEPR theory. The particulate model shown below represents the moles of particles present in the container after D(g)D(g) and F2(g)F2(g) have reacted in a different experiment. Assume that each particle in the diagram represents one mole of the respective substance. (Note: The box corresponding to “Before Reaction” is intentionally left blank.) (d) If the total pressure at the end of the reaction is 12 atm12 atm, what is the partial pressure of DF4(g)DF4(g)?
An unknown gas, DD, reacts with fluorine gas to form the compound DF4(g)DF4(g), as represented by the following equation.
D(g)+2F2(g)→DF4(g)D(g)+2F2(g)→DF4(g)
A series of experimental trials were performed at 600∘C600∘C to determine the rate law expression for the reaction. Data from the trials are shown below.
|
Initial PDPD (torrtorr) |
Initial PF2PF2 (torrtorr) |
Initial Rate of Appearance of DF4(g)DF4(g) (torr/mintorr/min) |
|
| Trial 1 | 3000 | 3000 | 2.50×10−22.50×10−2 |
| Trial 2 | 6000 | 3000 | 5.00×10−25.00×10−2 |
| Trial 3 | 3000 | 6000 | 10.0×10−210.0×10−2 |
(a) A student claims that the reaction is first order with respect to D(g)D(g). Do you agree or disagree? Justify your answer using the data above.
(b) What is the initial rate of disappearance of F2(g)F2(g) in trial 1? Justify your answer.
(c) A student claims that if element DD is in group 18, then the molecular geometry of DF4(g)DF4(g) is tetrahedral. Do you agree or disagree with the student? Justify your answer in terms of VSEPRVSEPR theory.
The particulate model shown below represents the moles of particles present in the container after D(g)D(g) and F2(g)F2(g) have reacted in a different experiment. Assume that each particle in the diagram represents one mole of the respective substance. (Note: The box corresponding to “Before Reaction” is intentionally left blank.)
(d) If the total pressure at the end of the reaction is 12 atm12 atm, what is the partial pressure of DF4(g)DF4(g)?
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