q determine the mass in gms for pure ag sample, Chemistry

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q determine the mass in gms for pure ag sample

Q. Determine the mass in gms for pure Ag sample that loses 2.88kJ if its temperature drops from 143 degree celsius to 28 degree celsius.?

Q. consider this chemical reaction ΔH = - 126 kJ mol-1, ΔS = 84 J K-1 mol^-1 and find the temperature at which the reaction becomes spontaneous also consider the second reaction ΔH = 11.7 kJ mol^-1, ΔS = 105 J K^-1 mol^-1 and find out temperature at which the reaction becomes spontaneous?

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