Heat capacity, expansion while heating and cooking

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SUMMARY

This discussion focuses on the relationship between heat capacity, thermal expansion, and cooking techniques. The formula for specific heat capacity, Q=mc(ΔT), does not account for the expansion of materials, which affects potential energy and bond strength. Additionally, the boiling point of saltwater is noted to be 101.4 degrees Celsius, yet vapor temperature can drop to 100 degrees Celsius due to pressure changes. The design of frying pans is also addressed, highlighting that black surfaces absorb and emit heat effectively, while silver surfaces retain heat longer, making them suitable for keeping food warm.

PREREQUISITES
  • Understanding of specific heat capacity and the formula Q=mc(ΔT)
  • Knowledge of thermal expansion and its effects on materials
  • Familiarity with boiling point variations in solutions, particularly saltwater
  • Basic principles of heat absorption and emission in cookware design
NEXT STEPS
  • Research the effects of thermal expansion on different materials during heating
  • Explore the principles of heat transfer in cooking, focusing on cookware materials
  • Learn about the relationship between pressure and boiling points in solutions
  • Investigate the design considerations for frying pans, including surface materials and heat retention
USEFUL FOR

Chemists, culinary professionals, materials scientists, and anyone interested in the physics of cooking and heat transfer.

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When we deal with heat capacity or specific heat capacity Q=mc(delta temperature) why don't we take into consideration about the expansion of the thing? Since expansion (should) increase the potential energy of the item since potential energy is the bond strength which is related to the particle distance. Then why when a salt water is boiled, the boiling point is 101.4 degrees but when the thermometer reads the temperature of the vapour, it drops down to 100? Shouldn't it be higher than that?

When designing a frying pan, is it best to have a black surface on both sides so that it can absorb a lot of heat and also emit a lot of heat onto the food? But if I want to keep the food warm for a long time without a heat source, then a silver one is better as it will not absorb the heat so quickly?

Thanks for the help!
 
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So is there a connection in the two things? Thanks for the help guys!
 

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