i have a lap report and those are the qquetsions if you know others can you please help me!!!
1.HOw do the specific heats of meals compare with water?
2). Do metals have high or low heat capacities? explain
3). Why do metals conduct heat well?
4).If i place a metal spoon and a wooden spoon in a pot of hot liquid on the stove whic will be too hot to touch after just a few minutes?
1.HOw do the specific heats of meals compare with water?
2). Do metals have high or low heat capacities? explain
3). Why do metals conduct heat well?
4).If i place a metal spoon and a wooden spoon in a pot of hot liquid on the stove whic will be too hot to touch after just a few minutes?
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1. Specific heat is a quantity that expresses the thermal energy needed to raise the temperature of 1-g of a specific material by 1 degree. The specific heat of water is 4.184-J/g*oC, the specific heats of metals are in the 0.1 range for gold and platinum, 0.2 range for silver, 0.4 range for iron and on up to 0.9 for aluminum. Water's specific heat ranges from 4.6 to 42 times greater than the metals.
2. Specific heat is a measure of a substance's ability (or capacity) to store heat. When heat is stored, it is a form of potential energy - not kinetic. Temperature is a measure of average kinetic energy. When a substance places most of its absorbed heat into potential energy, its temperature does not change much. Metals tend to place more absorbed heat into kinetic energy and experience large temperatures changes while materials like water with high specific heats place more of the absorbed energy into potential and do not show large changes in temperature, Generally, materials with low specific heats heat up and cool down quickly; materials with high specific heats heat up and cool down slowly.
3. Conductors of heat are materials that pass on absorbed thermal energy to another material in which they are in contact rather then keeping it. One major premise of the law of thermodynamics states that when two substances at different temperatures are in contact, heat will flow from the one with the highest temperature into the one with the lower temperature and WILL CONTINUE UNTIL BOTH REACH the same final temperature. Since metals experience greater temperature changes than materials with high specific heats, they quickly begin passing heat to the other material.
4. Thermal energy passed to a metal spoon will cause a greater temperature change than the same quantity of heat passed to a wooden spoon - a non conductor. Non-conductors store more of the thermal energy as potential energy (no temperature change) while metals put the energy into kinetic energy (temperature change).
2. Specific heat is a measure of a substance's ability (or capacity) to store heat. When heat is stored, it is a form of potential energy - not kinetic. Temperature is a measure of average kinetic energy. When a substance places most of its absorbed heat into potential energy, its temperature does not change much. Metals tend to place more absorbed heat into kinetic energy and experience large temperatures changes while materials like water with high specific heats place more of the absorbed energy into potential and do not show large changes in temperature, Generally, materials with low specific heats heat up and cool down quickly; materials with high specific heats heat up and cool down slowly.
3. Conductors of heat are materials that pass on absorbed thermal energy to another material in which they are in contact rather then keeping it. One major premise of the law of thermodynamics states that when two substances at different temperatures are in contact, heat will flow from the one with the highest temperature into the one with the lower temperature and WILL CONTINUE UNTIL BOTH REACH the same final temperature. Since metals experience greater temperature changes than materials with high specific heats, they quickly begin passing heat to the other material.
4. Thermal energy passed to a metal spoon will cause a greater temperature change than the same quantity of heat passed to a wooden spoon - a non conductor. Non-conductors store more of the thermal energy as potential energy (no temperature change) while metals put the energy into kinetic energy (temperature change).