[lala56]

hi? when ice goes from solid to liquid, ?H is positive, and ?S is postive.  So, when will ice melt spontaneously? for this of course, the ?G must be negative, therefore, if ?G = ?H - T?S, then ?H - T?S must be negative ... but when will this ?G (free energy) be negative so that when ice melts, the reaction is spontaneous? what conditions are required?

thanks

[mrdeadman]

solve for "T" when g is zero. and then use logic.

[syko sykes]

at 1 atm of pressure, any temperature above the melting point (273K) would give a spontaneous reaction

[lala56]

ooohhh, dang, thanx guys