Gloves are often worn to protect the hands from being burned when they come in contact with very hot or very cold objects. Gloves are often made of cotton or wool, but many of the newer heat-resistant gloves are made of silicon rubber. The specific heats of these materials are listed below: Material Specific heat (J/g°C) wool felt - 1.38 cotton 1.33 paper 1.33 rubber 3.65 silicon rubber 1.46 (a) If a glove with a mass of 99.3 grams composed of cotton increases in temperature by 15.3°F, how much energy was absorbed by the glove? (b) A glove with a mass of 86.2 grams increases in temperature by 25.9°F when it absorbs 1.71 kJ of energy. Calculate the specific heat of the glove and predict its composition. (c) If a glove with a mass of 50.0 grams needs to absorb 1.65 kJ of energy, how much will the temperature of the glove increase for each of the materials listed above? (d) Which is the best material for a heat-resistant glove? (e) If you were designing a heat-resistant glove, what kind of specific heat would you look for?
Gloves are often worn to protect the hands from being burned when they come in contact with very hot or very cold objects. Gloves are often made of cotton or wool, but many of the newer heat-resistant gloves are made of silicon rubber. The specific heats of these materials are listed below:
Material Specific heat (J/g°C)
wool felt - 1.38
cotton 1.33
paper 1.33
rubber 3.65
silicon rubber 1.46
(a) If a glove with a mass of 99.3 grams composed of cotton increases in temperature by 15.3°F, how much energy was absorbed by the glove?
(b) A glove with a mass of 86.2 grams increases in temperature by 25.9°F when it absorbs 1.71 kJ of energy. Calculate the specific heat of the glove and predict its composition.
(c) If a glove with a mass of 50.0 grams needs to absorb 1.65 kJ of energy, how much will the temperature of the glove increase for each of the materials listed above?
(d) Which is the best material for a heat-resistant glove?
(e) If you were designing a heat-resistant glove, what kind of
specific heat would you look for?
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