Homework Help: chemistry

Posted by Mariah on Tuesday, January 22, 2013 at 4:26pm.

A mixture of 1.441 g of H2 and 70.24 g of Br2 is heated in a 2.00-L vessel at 700 K. These substances react as follows.
H2(g) + Br2(g) arrow 2 HBr(g)
At equilibrium the vessel is found to contain 0.627 g of H2.
calculate their equilibrium concentrations and Kc

chemistry - DrBob222, Tuesday, January 22, 2013 at 6:25pm
mols H2 @ equil = 0.627g/2 = 0.3135
M H2 @ equil = 0.3135/2L = 0.1567M
M H2 begin = (1.441/4) = 0.360M
M Br2 begin = (70.24/159.8) = 0.440M

........H2 + Br2 ==> 2HBr
I.....0.36..0.44.....0
C.....-x.....-x.......2x
E...0.36-x..0.44-x...2x
At equil (H2) = 0.157M; therefore, we know
0.36-x = 0.157 and we solve for x. Use that to calculate each of the equilibrium values, substitute those into the Kc expression and calculate Kc.
chemistry - DrBob222, Tuesday, January 22, 2013 at 6:27pm
Be sure and check (confirm) those numbers. I just ran them one time on my calculator.

Answer this Question

Related Questions

chemistry - At 1285 degree C the equilibrium constant for the reactin Br2(g) &...
Chemistry - The initial pressure of BrCl(g) in a reaction vessel is 1.6 mbar. If...
Chemistry - At 1285°C, the equilibrium constant for the reaction Br2 (gas) &...
Chemistry - A 5.00 gram mixture of CaO and CaO3 is heated strongly. After ...
AP CHEMISTRY - A mixture of H2, S, and H2S is held in a 1.0-L vessel at 90°C...
Chemistry - The equilibrium constant for HI decomposition at 500 °C is 5.8&...
Chemistry - The equilibrium constant for HI decomposition at 500 °C is 5.8&...
Chemistry - For the following reaction, Kp = 3.5 104 at 1495 K. H2(g) + Br2(g) ...
chemistry - When 1.70 mol CO2 and 1.70 mol H2 are placed in a 0.850 L container ...
Chemistry - A mixture of 0.47 mole of H2 and 3.59 moles of HCl is heated to ...

For Further Reading

First Name:
School Subject:
Answer: