Physical Chemistry Question Hello, im working on a worksheet and part IV is Heat

Question

Physical Chemistry Question

Hello, im working on a worksheet and part IV is Heat, and i dont know how to do it!

IV. Heat, Heat is given the symbol "q". A. Defining heat. 1. What is heat? 2. Is heat a state function? Why or why not? 3. Can a system contain heat? Why or why not. B. Heat capacity. I. Thie general thermodynamic definition of heat capacity is: C = dq/dT Define heat capacity in words based on this relationship. To find the integrated expression for the heat exchanged during a macroscopic change, simply separate the variables in the definition of heat capacity and integrate both sides of the equation. i) separate the variables ii) integrate the equation It is wiser to serve hot tea in a ceramic mug than a metal mug. Explain this statement in terms of the relative heat capacities of the two materials. In class exercises 2.7a (not AH), 2.9a 4

Explanation / Answer

1) heat = heat is the amount of energy flowing from one body to another body due to temperature difference

2) Heat is not a state function . It is a path function.Heat do not depend the initial and final state

3) No a system cannot contain heat . Heat is a only transferable form of energy

heat capacity = amount of heat energy required to raise the temperature of 1 gram of water through 1oC

C = dq/dT

C dT = dq

integrating both sides we have

Q = CT

It is always better to serve in a ceramic mug because the specific heat capacity of the material is low and it allows less heat loss .

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