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melodymuzeya017
3 days ago
Chemistry
College
1. You are given 50 g of hot coffee (at 80 °C) but given that it is a hot day, you now
want a cold coffee. What is the minimum amount of ice (in grams) that you must add
to cool the coffee to a temperature of 10 °C? Assume that coffee has the same specific
heat as water and neglect the heat content of the cup and heat exchanges with the
surroundings. The ice temperature is 0 °C. Given: water(3) — 37.6 J/(mol °C), Cwatert 1) =
75.4 J/mol °C), AH tus – 6.01 kJ/mol.
If the
ice comes
from a freezer at - 20 °C, would you expect to have to add more or
less ice to cool the coffee? Support your answer by doing the calculation.​