Multiple choice question

If �H f ° = 3400 cal/mol, then calculate standard free energy for ozone
formation at 298 K
iz'u&40 cQZ ds fi?kyus dh 25°C ij xyu ,UFksYih 6.97 KJ mol –1 gS rFkk xyu dh
,UVªkWih 25.4 J mol –1 K –1 gSA eqDr ÅtkZ ifjorZu dh x.kuk dhft;s\ ;g
fu/kkZfjr Hkh dhft;s fd bl rki ij cQZ Lor% fi?kyuh pkfg;s vFkok ugha\
The enthalpy of fusion for ice at 25°C is 6.97 KJ mol –1 and entropy of fusion
is 25.4 J mol –1 K –1 Calculate the value of free energy change? Also decide
whether ice should melt or not automatically at this temperature?
iz'u&41 400 K ij fuEu jklk;fud vfHkfØ;k ds fy;s lkE; fLFkjkad (K) dh x.kuk
dhft;s\ (�H° = 80 KJ mol –1 rFkk �S° = 120 JK –1 mol –1 )
2NOCl 2NO + Cl (g) (g) 2(g)
For the following chemical reaction calculate value for chemical equilibrium
constant (K) at 400K (�H° = 80 KJ mol –1and
�S° = 120 JK–1 mol –1 )
iz'u&42 jklk;fud vfHkfØ;k x y ds fy;s ekud ,UVªkWih ifjorZu dh x.kuk
dhft;s] ;fn 298 K ij �H° = 28.4 KJ rFkk K = 1.8 x 10 –7 fn;k x;k gksA
If �H° = 28.4 KJ and K = 1.8 x 10 –7 is given then for a chemical reaction
x y calculate standard entropy change?
iz'u&43 fuEu vfHkfØ;k ds fy;s vfHkdkjdksa ds ,d&,d eksy }kjk vfHkfØ;k 27°C ij
vkjEHk djkbZ xbZA tc vfHkfØ;k ds vfHkdkjdksa dsk 2@3 Hkkx iz;qDr gks x;k
rc tkdj lkE; dh fLFkfr igq¡phA vfHkfØ;k %&
CH 3 COOH (l) + C 2 H 5 OH (l) CH 3 COOC 2 H 5(l) + H 2 O (l) ,
ds fy;s eqDr ÅtkZ ifjorZu Kkr dhft;s\
For the reaction :–
CH 3 COOH (l) + C 2 H 5 OH (l) CH 3 COOC 2 H 5(l) + H 2 O (l) ,
initially at 27°C one geam mol of each reactant was taken to start the reaction,
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