Question №º3.3. (Problem 3.9 from Finn's Thermal Physics) Your 200-g cup of coffee is too hot to drink at 95°C. Assume coffee has the same thermal properties as water. (a) Suppose you want to cool the coffee by adding 20°C water. How much water do you need to add so that the mixture reaches equilibrium at 75°C? (b) Instread of water you use ice initially at 0°C to cool the coffee. How much ice is needed to bring the mixture to equilibrium at 75°C?
Question №º3.3. (Problem 3.9 from Finn's Thermal Physics) Your 200-g cup of coffee is too hot to drink at 95°C. Assume coffee has the same thermal properties as water. (a) Suppose you want to cool the coffee by adding 20°C water. How much water do you need to add so that the mixture reaches equilibrium at 75°C? (b) Instread of water you use ice initially at 0°C to cool the coffee. How much ice is needed to bring the mixture to equilibrium at 75°C?
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Transcribed Image Text:Question №º3.3. (Problem 3.9 from Finn's Thermal Physics) Your 200-g cup of coffee is too
hot to drink at 95°C. Assume coffee has the same thermal properties as water.
(a) Suppose you want to cool the coffee by adding 20°C water. How much water do you
need to add so that the mixture reaches equilibrium at 75°C?
(b) Instread of water you use ice initially at 0°C to cool the coffee. How much ice is needed
to bring the mixture to equilibrium at 75°C?
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