How Do You Calculate Energy Changes in Water Phase Transitions?

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SUMMARY

This discussion focuses on calculating energy changes during water phase transitions, specifically involving steam, ice, and water. Key calculations include the energy released when 10g of steam condenses and cools to water, the amount of ice melted from 1840 calories added to 300g of ice, and the final state of water after removing 3600 calories from 5g of steam. The relevant equations utilized are Q = mcΔT, along with values for specific heat capacity and latent heat of fusion for water.

PREREQUISITES
  • Understanding of thermodynamics principles, specifically phase transitions.
  • Familiarity with the equation Q = mcΔT for calculating heat transfer.
  • Knowledge of specific heat capacity and latent heat of fusion for water.
  • Basic skills in unit conversion and energy calculations.
NEXT STEPS
  • Research the specific heat capacity of water and ice for accurate calculations.
  • Learn about latent heat of vaporization and fusion for phase change calculations.
  • Study the concept of energy conservation in thermodynamic processes.
  • Explore practical applications of phase transition calculations in real-world scenarios.
USEFUL FOR

Students studying thermodynamics, educators teaching energy transfer concepts, and anyone involved in physics or chemistry related to phase transitions of water.

stupefy07
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Homework Statement



1. What amount of energy is released whan 10g of steam at 100 degrees C condenses and then cools to water at 0 degrees C?

2. 1840 calories of heat is added to a 300g block of ice at 0 degrees C. what amount of ice melts?

3. 3600 calories of heat is removed from 5g of steam initially at 100 degrees C. In what form is the water in the end?

4. Consider 35g of water at 1000C. If 4g rapdily evaporates, what will be the temperature of the remaining 31 grams of water?

Homework Equations



Q = mcT

The Attempt at a Solution



1. it takes 540 then 100 then 80...do i add those up and multiply by 10?
2. no idea
3. no idea
4. i know evaporation is a cooling process so there will be less heat in the 31 grams of water...but nothing else
 
Physics news on Phys.org
Use the relation between heat capacity, mass, temperature and heat.
Look up values for heat capacity, specific heat capacity and latent heat of fusion/melting for water.
 

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