1- Consider an ounce (25.0 g) of liquid water at 100o C. Suppose it comes in con

ID: 2108743 • Letter: 1

Question

1- Consider an ounce (25.0 g) of liquid water at 100o

C. Suppose it comes in contact

with your skin and quickly cools to 80o

C. How much heat is transferred from the

water to your skin? (Ignoring heat loss to the surrounding air.)

2- Consider 25.0 g of water vapor at 100o

C. Suppose it comes into contact with your

skin, quickly condenses to liquid water, and cools to 80o

C. How much heat is

transferred to your skin? (Again, ignoring other avenues of heat loss.)

3- Which is going to be suckier for you? What is the suck factor, S?

1) Q = m c dT = 25.0E-3*4186*20=2093 J

2) Q = mL + mc dT = 2260E3*25.0E-3+2093=58593 J

3) the 2nd case. S = 58593/2092=28

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