2 moles of ice at -10°C and 20 moles of water at 20°C.
you have 3 steps for ice:
1. ice heating from -10° to 0°; DHi=38*10*2= ... calculate yourself
2. ice melting at 0°C ; DHm=2* 6007= ...
Now, you must find if the water is enough to melt all ice:
DHw=75*20*10= ...
if DHw>DHm+DHi, then all ice will melt, and you can calculate the temperature for total melting and after that the final temp.
if not, then means you'll have a mixture ice-water at 0°C.
Good luck!
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