20. What are the signs of AH and AS for a reaction that is spontaneous at any temperature? O A) AH is positive, AS is positive O B) AH is positive, AS is negative O C) AH is negative, AS is negative O D) AH is negative, AS is positive

will the reaction be spontaneous? If not write thespontaneous direction, and calculate the Ecell. Sketch thecell and write the line notation of the spontaneous reaction. Zn + Ca2+ → Zn2+ + Ca a) Spontaneousb) Not spontaneousc) Not sure

W ↑ To determine the spontaneity of a chemical reaction, the sign of AG rather than the sign of AS is generally used. This is because O (1) AG is always positive and AS may be positive or negative O (2) Free energy free and it is easier to understand than entropy. O (3) AG is always larger than AS O (4) none given #3 3 A Moving to the next question prevents changes to this answer. E C $ 4 D R G Search or type URL % 5 MacBook Pro T (O G Y & 7 H U * 8 J 9 K 0 1 L Questi P

When AH is negative and AS is positive, the reaction is: ONever spontaneous Spontaneous at low temperatures O Always spontaneous O Spontaneous at high temperatures