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Steam can cause more serious burns than water at the same temperature. Here we examine this...

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Physics

Steam can cause more serious burns than water at the sametemperature. Here we examine this effect quantitatively, notingthat flesh becomes badly damaged when its temperature reaches50.0

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4.1 Ratings (741 Votes)

1 heat released by water = mH2O x specific heat of water x delta(T)

                                  = 14.7 x 4.18 x 50 = 3072.3 J

2 heat released by steam = heat relesed during conversion to water + heat released while cooling down

                                      = msteam x latent heat of vaporisation + m x specific heat x delta(T)

                                      = 14.7 x 2257+ 14.7 x 4.18 x 50

                                     =     33177.9     +3072.3

                                      = 36250.2

3 heat released = m fleshx specific heat of flesh x delta(T)

m flesh = heat released/(3000 x 13)

a . mflesh = 3072.3/39000 = 0.07877kg = 78.77grams

b .mflesh = 36250.2/39000 = 0.92949 =929.49 grams
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