add the following heats needed:
ice going to 0 deg: massice*Cice*(18)
melted ice to finaltemp: massice*cwater(Tf-0)
add the heat from the water:
masswater*cwater(Tf-100)
and finally, add all these heats and set it equal to zero, and solve for Tf.
Sum heats gained=0 (remember, if somthing lost heat, it will work our to be a negative heat gained).
Calculate the final temperature of a mixture of 350g of ice cubes at -18 degrees C and 237 g of water at 100 degrees C
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