How much heat H2 is transferred by 25.0 g of water onto the skin? How much heat

Question

How much heat H2 is transferred by 25.0 g of water onto the skin?

How much heat H2 is transferred by 25.0 g of water onto the skin? To compare this to the result in the previous part, continue to assume that the skin temperature does not change.

Assume that water and steam, initially at 100?C, are cooled down to skin temperature, 34?C, when they come in contact with your skin. Assume that the steam condenses extremely fast. We will further assume a constant specific heat capacity c=4190J/(kg?K) for both liquid water and steam.

Explanation / Answer

for steam= mc[100-34] + m*latent heat of vapourization

              = 25*10-3[4190*66 + 2260000]

              = .025*253654   = 63413J

for water = .025*4190*66 = 6913J

Related Questions

Navigate

• Browse (All)
• Browse H
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.