(d) b a − 11th Std Chemistry 11th Std Chemistry - - - - . (d) – . kJ . (c) kJ mol – .
(a) D H < and D S > . (c) adiabatic expansion . (d) (–, –, +) . (b) ⁰C .
(d) CaCO (S) → CaO(S) + CO (g) . (a) 300K Keys to multiple choice questions: . w = – P D V w = – ( × Nm – ) ( × – m – × – m ) w = – ( – – – ) Nm w = – ( – ) – ) J w = – ( × – ) J w = – × J w = – J . CO g O g CO g ( ) ( ) ( ) → D H C (CO) = D H f (CO ) – D H f (CO) + D H f (O )] D H C (CO) = – KCal – [– .
KCal + ] D H C (CO) = – KCal + . KCal D H C (CO) = – . KCal . 2Al + Cr O → 2Cr + Al O D H r = [ D H f (Cr) + D H f (Al O )] – [ D H f (Al) + D H f (Cr O )] D H r = [ + (– kJ)] – [ + (– )] D H r = – kJ + kJ D H r = – kJ .
D U = q + w D U = – kJ + kJ D U = + 3kJ . Fe + 2HCl → FeCl +