- #1

merbear

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**[SOLVED] Grams and volume of steam needed to raise the temperature of expresso**

## Homework Statement

The temperature of espresso coffee (mostly water) can be increased by blowing 100°C steam into it. How much steam (in grams) is needed to heat up a 13 cm3 cup of espresso from 46°C to 82°C? What is the volume of this quantity of steam, assuming that the steam is an ideal gas

## Homework Equations

Q=mcdeltaT

dq=Cv*dt

## The Attempt at a Solution

I know that the specific heat- amount of heat needed to raise the temperature 1 degree -is 4.186 J/gC. But I really don't have any idea as to how to start the problem. I tried using Q=mcdeltaT, but I don't have a value for Q.

I would appreciate any help in getting started. Thank you.