Which of the following species would be isoelectronic I S 2 II Ar

What would the potential of a standard hydrogen electrode (S.H.E.) be under the following [H^(+)]=0.38MquadP_(H_(2))=4.7atmquad T=298K E=

Which of the following must be true for a spontaneous endothermic process?

a. ΔS < 0 and | ΔS | > | ΔSSURR | 

b. ΔS > 0 and | ΔS | < | ΔSSURR |

c. ΔS < 0 and | ΔS | < | ΔSSURR |

d. ΔS > 0 and | ΔS | > | ΔSSURR |

e. either ΔS > 0, or ΔS < 0 but | ΔS | < | ΔSSURR |

Consider a process in which 220 kJ of work are performed on a gaseous system at 37oC.

If at the end of the process the temperature of the system is still 37oC, what can you say

about heat involved in this process? 

a. q = -440 kJ

b. q = -220 kJ

c. q = 0.0 kJ

d. q = +220 kJ

e. q = +440 kJ

The standard heat of combustion of ethanol, C2H5OH, is 1372 kJ per 1 mole of ethanol.

How much heat would be liberated by completely burning a 20.0-g sample of ethanol? 

a. 29.8 kJ 

b. 68.6 kJ

c. 597 kJ

d. 3156 kJ

e. 27440 kJ

Given that at 298K for the reaction A3 + 6B → 3AB2 ΔHo = 75 kJ/mol, what is the ΔHo

value for the reaction AB2 → (1/3)A3 + 2B at 298K? T9L2

a. +75 kJ/mol

b. +25 kJ/mol

c. -25 kJ/mol 

d. -75 kJ/mol

e. -230 kJ/mol

Which one of the following reactions do you expect to exhibit a decrease in entropy?

a. AgCl (s) → AgCl (aq) 

b. C8H8 (s) + 10 O2 (g) → 8CO2 (g) + 4H2O (g) 

c. CH2O (g) + O2 (g) → H2O (l) + CO2 (g)

d. H2SO4 (aq) → H+(aq) + HSO4-(aq)

e. H2 (aq) → H2 (g)