Blog

Passage 5             (1) In the late 1700s, slavery in the North became less widespread. In 1774, Philadelphians, among them Benjamin Franklin, organized an anti-slavery society. Pressure from this group and from Quakers resulted in Pennsylvania becoming in the first state to declare slavery illegal in 1780. Soon after, other states followed. Slaves themselves were also very active in challenging human bondage.             (2) Quok Walker of Massachusetts ran away from his master in April 1781 and sought refuge with a friendly neighbor. His master found Walker a few days later and attacked him with a whip. Beaten severely, Walker stood his ground. He sued for his freedom, pointing out that the new state constitution stated that “all men are born free and equal.” The State Superior Court ruled in Walker’s favor in 1783, and this decision signaled the end of slavery in Massachusetts.             (3) Other events followed, and by 1804, every state north of the Ohio River had passed anti-slavery laws.

In paragraph 6, the word vast is closest in meaning to ___.

Which of these events happened LAST?

The spread of the Hong Kong flu virus was prevented by ___.

Use the difference quotient to compute the derivative of the function

Find the area beneath the graph

If the standard Gibbs free energy change (ΔG°) for a reaction is a large negative number, which statement will be TRUE at equilibrium for this reaction?

Consider the following hypothetical reaction at 560 K: 2 A (g) + B (g) → C (g)       ∆G° = -18.1 kJ/mol If the partial pressures of A, B, and C are 0.350 atm, 0.250 atm, and 2.50 atm respectively, what is the free energy (∆G, in kJ/mol) for this reaction?

A reaction has ΔG = +100 kJ/mol. Which of the following statements best describes this reaction?

Barium carbonate will decompose when heated to produce barium oxide and carbon dioxide as shown in the following reaction at 25°C:             BaCO3(s)  →  BaO(s)  +   CO2(g)   ΔH° = 269.3 kJ/mol ΔG° = 218.1 kJ/mol Above what minimum temperature will the reaction become spontaneous under standard state conditions? Hint:  Assume ΔH and ΔS are independent of T  Hint:  Think about the value of ΔG when a reaction goes from nonspontaneous to spontaneous.