Question

for each of the chemical reactions listed below, predict the sign of the entropy. if its not possible to decide with the info given, check not enough info.

reaction sign of reaction entropy 45px < 0 NaCl(s) — Na (aq) + C (aq) e A Sex > 0 not enough information, © Sex < 0 © aSix > 0 N,(9) + 3H, (9) — 2NH3(g) not enough information ASxn < 0 CH (9) + Br2(g) BrCH,CH, Br(1) A Sex > 0 not enough information

Answer 1

Entropy measure degree of randomness, which increase with increase in no. of particles and with increase in movement of particles.

1. Entropy increases

2.Entropy decrease

3. Entropy decrease... Please go through attached image for detailed explanation

of randomness. Entopy regree particles increase - men no. of → It measures degree of ran Entropy increases, when no of increases. solid < liquid < gas - entropy increases Since o in gaseous form movement of particles is more so cater gase are considered more random, je. has higher entropy. 7 Nacles) - Nacaq) + ci caq.). one partide converting into two partides, So no of particles increases, ie. entropy will increase Don>0] 7. N. (g) + 3H₂ (9) > 2Ntz (g) 1 mol smol emol - 4 mol gases converting into a mol i.e. no. of particles decreases i.e. entropy decreases DSRxn <07 CHA (g) + Boz (g) - Br CH₂ Br (1) - 2 mol gas converting 1 mol liquid whid has Low entropy i.e. entropy decreases. osinco