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whitakers87
26.09.2019 •
Chemistry
Methane, ch4, reacts with i2 according to the reaction ch4(g)+i2(g)⇌ch3i(g)+hi(g)
at 630 k, kp for this reaction is 2.26×10−4. a reaction was set up at 630 k with initial partial pressures of methane of 105.1 torr and of 7.96 torr for i2.
calculate the pressure, in torr, of ch4.
express your answer to four significant figures and include the appropriate units.
calculate the pressure, in torr, of i2.
express your answer to three significant figures and include the appropriate units.
calculate the pressure, in torr, of ch3i.
express your answer to three significant figures and include the appropriate units.
calculate the pressure, in torr, of hi.
express your answer to three significant figures and include the appropriate units.
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Ответ:
pCH₄ = 105.1 - 0.42 = 104.68 torr
pI₂ = 7.96 -0.42 = 7.54 torr
pCH₃I = 0.42 torr
pHI = 0.42 torr
Explanation:
Kp is the equilibrium constant for the partial pressure of the gases in the reaction, and it is calculated for a general equation:
aA(g) + bB(g) ⇄ cC(g) + dD(g)
CH₄(g) + I₂(g) ⇄ CH₃I(g) + HI(g)
105.1 torr 7.96 torr 0 0 initial partial pressure
-x -x +x +x react
105.1-x 7.96-x x x equilibrium
Then:
x² = 0.1891 - 0.0255x -2.26x10⁻⁴x²
0.9997x² + 0.0255x - 0.1891 = 0
Using Bhaskara's rule:
Δ = (0.0255)² - 4x(0.9997)x(-0.1891)
Δ = 0.7568
Using only the positive term, x = 0.42 torr.
So,
pCH₄ = 105.1 - 0.42 = 104.68 torr
pI₂ = 7.96 -0.42 = 7.54 torr
pCH₃I = 0.42 torr
pHI = 0.42 torr
Ответ:
The given information gives us the clue that deuterium and tritium react together. We need to find the balanced nuclear reaction of deuterium and tritium; however, first, let me explain you what deuterium and tritium are.
Deuterium and tritium are two isotopes of hydrogen having atomic mass of 2 and 3 respectively. Deuterium is represented by
, whereas tritium is written as
.
When deuterium and tritium collide together, they form Helium atom, which is written as
, and also release energy (and shoot out one neutron).
Hence, the balanced nuclear reaction will be the following:
-i