Given the reaction PCl5(g)<--> PCl3(g)+Cl2(g)
In a 1.00 L flask, 0.72 mol of PCl5 and 0.18 mol of PCl3 are mixed together. Reaction occurrred to equilibrium and tests showed that 0.60 mol of PCl5 was now present. Calculate the Keq value.
(Answer: 6.0*10-2)although I cannot figure out how to find this without a given value from Cl2.
Posted 8 years ago by grk546 in Chemistry 30 | 1 answers
#equilibrium
Given N2(g)+O2(g)<--> 2NO(g) Keq=8.00 *10-2 at 500 C
In a 2.00L flask, 0.4 mol of N2 and 0.4 mol of oxygen gas, O2, reacted to equilibrium. Establish the equilibrium concentration of all the gases.
(Answer: [N2]=0.175 mol/L; [O2] = 0.175 mol/L; [NO] = 0.0496 mol/L) This one has got a quadratic I can't figure out
My first step: $\frac{\left(2x\right)}{\left(0.2-x\right)^2}=0.08$(2x)(0.2−x)2 =0.08
My second step: $0.08\cdot\left(.2-x\right)\left(.2-x\right)=2x$0.08·(.2−x)(.2−x)=2x
Don't know what's next
Posted 8 years ago by grk546 in Chemistry 30 | 1 answers
#equilibrium
Given the reaction 2SO2 + O2 ---> 2SO3
Eq constant is 2.8X102 at 727 $^{\circ}$? C
Is the percentage of sulfur dioxide that reacts with oxygen at this temperature relatively large or relatively small? How does the percentage of SO2(g) that reacts compare with the percentage of O2(g) that reacts?
Posted 8 years ago by ilikeyou in Chemistry 30 | 1 answers
#equilibrium
Calculate the standard enthalpy change for the net reaction from the following chemical equations and standard enthalpy changes.
A) 2C+O2-->2CO. =-221.0KJ
B) C+O2-->2CO2. = -393.5KJ
C) 2H2+O2-->2H2O. =-483.6KJ
NET: CO+H2+O2-->CO2+H2O =?
Posted 8 years ago by in Chemistry 30 | 1 answers
#net enthalpy
-2.09595 x (T2-95.6) degrees celcius=104.5 x (T2-25) degrees celcius
I am trying to solve for T2
Posted 8 years ago by dbrar in Chemistry 30 | 2 answers
#net enthalpy
How do I calculate the moles of carbon present in a polymer if I dont have the structural formula ?. I only have the molecular weight.
Posted 8 years ago by Joseph17 in Chemistry 30 | 3 answers
#polymers
what amount of heat energy is produced when 1.0 kg of CO2 (g) is produced durint the combustion of octane
Posted 7 years ago by bgrimes in Chemistry 30 | 3 answers
#net enthalpy
HESS first Law
Posted 7 years ago by TRISHA in Chemistry 30 | 1 answers
#net enthalpy
Pairs of solutions
1.0 mol/L HNO3(aq) and 1.0 mol/L LiOH(aq)
1.0 mol/L HBr(aq) and 1.0 mol/L LiBr(aq)
1.0 mol/L HNO2(aq) and 0.10 mol/L LiNO2(aq)
1.0 mol/L HCO3-(aq) and 1.0 mol/L CO32-(aq)
If each of the pairs of solutions listed above is mixed together in equal volumes, then the pair of solutions that could act as a buffer is numbered
Posted 7 years ago by maddy_vang in Chemistry 30 | 1 answers
#chemistry 30
A technician combined 25 mL of 1.0 mol/L HF(aq) with 25 mL of 1.0 mol/L NaF(aq). The following buffer equilibrium was established.
HF(aq)+H2O(l)?H3O+(aq)+F−(aq)
What would limit the buffering action if a sample of a strong acid was added?
Posted 7 years ago by maddy_vang in Chemistry 30 | 1 answers
#chemistry 30