One mole of solid Zn is placed in excess of dilute H2SO4 at 27°C in a cylinder fitted with a piston. Find the value of AU, q and w for the process if the area of piston is 500 cm² and it moves out by 50 cm against a pressure of 1 atm during the reaction. The heat given to surrounding is 36.5 kJ. Zn(s) + 2H+ (aq) → Zn²+ (aq) + H2(g)

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( q=-36.5 k J ) Inigative dunter the luat releassd) [ begin{array}{l} V=500 times 50=25000 mathrm{cm}^{3}=25 mathrm{l} w=-P . d mathrm{w}=-1 times(25)=-25 mathrm{latm} end{array} ] As we lawow, ( 1 k+=9.86 ) bettm 6 [ begin{array}{l} therefore-25 L a+m=-2.53 mathrm{kF} Delta E=9+D . d N end{array} ] [ =-36.5+2.53 ] ( =-39.03 ) EF/mol.

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