specific heat

be specific

Specific heat is a measure of how much energy it takes to raise the temperature of a substance. It is the amount of energy (in joules) needed to raise the temperature of 1 gram of the substance by 1 C. Specific heat is a property that is specific to a given type of matter. Thats why its called specific.

variation in specific heat

The Table 1.1 compares the specific heat of four different substances. Metals such as iron have low specific heat. It doesnt take much energy to raise their temperature. Thats why a metal spoon heats up quickly when placed in a cup of hot coffee. Sand also has a relatively low specific heat. Water, on the other hand, has a very high specific heat. It takes a lot more energy to increase the temperature of water than sand. This explains why the sand on a beach gets hot while the water stays cool. Differences in the specific heat of water and land even affect climate. Substance iron sand wood Specific Heat (joules) 0.45 0.67 1.76 Q: Metal cooking pots and pans often have wooden handles. Can you explain why? A: Wood has a higher specific heat than metal, so it takes more energy to heat a wooden handle than a metal handle. As a result, a wooden handle would heat up more slowly and be less likely to burn your hand when you touch it.

instructional diagrams

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questions

specific heat is a physical property of matter.

-->  a. true

b. false

a substance with high specific heat heats and cools quickly.

a. true

-->  b. false

metals have relatively high specific heats.

a. true

-->  b. false

which of the following substances has the lowest specific heat?

-->  a) iron

b) sand

c) wood

d) water

the specific heat of water is

a) 0.18 j/g.

b) 0.67 j/g.

c) 1.76 j/g.

-->  d) 4.18 j/g.

lead has a very low specific heat.

-->  a. true

b. false

diagram questions

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