Use the reaction and information below for questions 1 - 3 CH_4 (g) + H_2 O(1) C

Question

Use the reaction and information below for questions 1 - 3 CH_4 (g) + H_2 O(1) CO(g) + 3H_2(g) K_ = 1.0 times 10^-4.T = 25 degree C, R = 0.0821 What is the value for K_ ? 1.0 times 10^4 1.0 times 10^-4 1.46 0.683 49.65 For the reaction below which of the following changes would cause both a shift to the products and an increase in the equilibrium constant? 2NH_3 (g) 3H_2(g) + N_2 (g) + Heat Increase pressure Decrease pressure Increase temperature. Decrease temperature Which of the following changed would not cause a shift to the products? Adding water Adding CH_4 Decreasing pressure Removing hydrogen Removing CO What is the K_ for: CO(g) + 3H_2(g) CH_4(g) + H_2 O(1) 1.0 times 10^-4 1.0 times 10^4 1.46 0.683 2.0 times 10^8 For a system in dynamic equilibrium which of the following statements is always true? The concentration of the products equals the concentration of the reactants. The reaction has stopped. The rate of the forward reaction equals that of the reverse. Changing the pressure will cause a shift in the equilibrium. For the reaction: PCI_3(g) + CI_2(g) PCI_5(g) How many of the following changes would cause a shift to the products? Decrease in volume Add a catalyst Add cl_2 gas Decease |PCl_5] 0 1 2 3 4 For the reaction below is the dissociation of a weak acid in water. Which of the following changes would cause a shift to the products? Adding a strong base Diluting with water Add NaF A-Only B-Only C-only A& B only A & C only

Explanation / Answer

Question 1.

find Kp, given

CH4 + H2O = CO2 + 3H2

Kp = Kc*(RT) ^ dn

dn = moles of products in gas phase - moles of reactants in gas phase

so

dn = (1+3) - (1) = 3

Kp = Kc*(RT) ^ dn

Kp = (10^-4)*(0.082*298) ^ 3

Kp = 1.45911

nearest answer is C

Q2.

note that

Addition of water will not affect, since it is LIQUID, and activity = 1 for water

All other will affect the equilibrium

Q3

Kc for

the INVERSE reaciton is simple to calcualte:

Knew = 1/Koriginal

Knew = 1/(10^-4) = 10^4

meanign this is much more favoured

choose B

Related Questions

Navigate

• Browse (All)
• Browse U
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.