Question

(e) For each pairing, circle the system (State 1 or State 2) that has the higher entropy (or choose “SAME"). Assume that T and P are the same for each system unless stated otherwise. **NOTE: You must make THREE circles here--this is not a "multiple choice" question.** State 1 State 2 i) 1 mol Na(s) OR 1 mol Li(s) OR SAME ii) 2 mol CH4(g) in 10 L OR 2 mol CH4(g) in 20L OR SAME iii) 5 mol O2(g) OR 3 mol NO2(g) OR SAME (f) (4 pt) A process that is entropy-decreasing in the system, will be spontaneous at really high T if i) it is endothermic. ii) it is exothermic. iii) it is either endothermic or exothermic. iv) none of the above (it won't be spontaneous at high T in either case). (g) A Galvanic cell was assembled with Cut/Cu and Mn2+/Mn half cells. The potential of the cell was measured to be 1.70 V with the Mn electrode as the negative electrode. Which is true? i) Cu is the anode. ii) Electrons flow from Cu to Mn. iii) Oxidation occurs at the Cu electrode. iv) Mn gets oxidized. v) None of the above is true. (h) Which is expected to release energy? i) fission of 139Ba ii) fusion of two 7°Ga's iii) fusion of two 56Fe's iv) fission of Li v) all of these Page 2 (i) Consider the case of a pure sample of a nuclide Y which decays by beta decay with a half-life of 5 days to form a stable nuclide X. Which is true? i) If the initial mass of Y was 8.0 g, then 2.0 g (two sig figs) of nuclide Y will be present after 10 days. ii) If Y has an atomic number of m, element X has an atomic number equal to m - 1. iii) The sample's mass will be exactly the same infinite number of sig figs) after decay is complete. iv) all of the above are true. v) none of the above is true (1) For a certain chemical system, Q<K and AGⓇ>0. Which of the following must also be true? i) AG >0 & K>1 ii) AG >0 & K<1 iii) AG <0 & K>1 iv) Q=1 V) AG<0 & K<1

this is the rest of one of the problems can you please help

Answer 1

(e) Entropy megus disor derness or randomness in a systema more the disorderness in a system more will be the entropy 1 mol Nas) 6.023x1023 Na atoms 2 { entropy is same 1 mol Lis 6.023x10 23 Li atoms s (11) 2 mol cHy (9) in 10L or a molchu (9) in 204) because increase of volume randomness increases hence entropy increases (ii) (5 mol 02 (9) or 3 mol NO₂ 9 because if number of moles increases, no of molecules also increases dere to this randomness in the system increases hence entsopy increas (f) At high temperature entrory increases in entropy - decreasing at high temperature is not spontaneus if it is spontaneus then it will be exothermic. (9) Mn electrode = -ve ) anodee ) oxidation in cell reaction is mu tacat - Muth tacy Electrous flow from anode cathode (ma to cu) in correct answer: Mu gets oxidised (Mu mnt 420) ophon civ) | oxidation occurs at Mu electrode. In Energy is released in both Nuclear tission and in Nuclear fusion corret auswer is all of these loption (3) 1 t 25 day > 89 – 49 – 5 dags 49 – 29 5 day +2 To days After ten days there will be 2 g. () is correct (11) In ß-dan day atomic number is increased by 1 (ii) is wrong (iii) After decay sample mass will be decreases ün is wrong (1) Q<k forward reaction favours K> 46² +2.303 RT lugK + 4Go if 4G70, ks) Then AGO . Answer: 46 70 tk >