HELP! PLEASE! CHEMISTRY QUESTION!?

Posted on 2016-02-17 18:37:00 in Chemistry by CHRIS

Please help me with the chemistry question below. Thanks. 

I recall on more than one occasion when our kids were small, we would come inside from playing in the snow and I would make hot chocolate by heating the milk in the microwave. Invariably, I would get the milk too hot for at least one of them. Rather than adding more cold milk to the hot chocolate (there wasn't room in the mug), I would often drop a couple of small ice cubes into the mug. I figured they would never notice the dilution effect that the water had on the hot chocolate since they always enjoyed adding about thirty marshmallows to the mixture after I served it to them anyway. 
Although I never actually took any temperatures of the hot chocolate, let's assume that the initial temperature was 180°F and the mug contained 300 g of hot chocolate. 

If the initial temperature of the hot chocolate is 180°F, what would the temperature of the drink be once the ice cubes had completely melted? 

Additional information: 
Weight of ice cubes = 85 grams total weight 
Initial temperature of ice cubes = - 22°C 
Specific heat capacity of the hot chocolate = 3.751 kJ/kg C°

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