When performing a calorimetry (for a constant pressure calorimeter) calculation we state that qrxn = -qwater...
When performing a calorimetry (for a constant pressure calorimeter) calculation we state that
qrxn = -qwater
What is the assumption that allows us to use this equation?
Homework Answers
As we know, Calorimeter minimizes the exchange of energy of reation with surrounding.
Because energy can neither be created nor be destroyed during a chemical reaction, there is no overall energy change during the reaction.
Heat produced or consumed in reaction + heat gained or lost by water =must be zero.
Thus qreaction+qwater =0
qreaction =-qwater
This assumption holds if calorimeter does not absorb any heat from surrounding and there is no energy exchange between calorimeter and surrounding.
this is the assumption.
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When performing a calorimetry (for a constant pressure
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a. In the laboratory a "coffee cup" calorimeter, or constant pressure calorimeter, is frequently used to...
a.
In the laboratory a "coffee cup"
calorimeter, or constant pressure calorimeter, is
frequently used to determine the specific heat of a solid, or to
measure the energy of a solution phase reaction.
Since the cup itself can absorb energy, a separate experiment is
needed to determine the heat capacity of the calorimeter. This is
known as calibrating the calorimeter and
the value determined is called the calorimeter
constant.
One way to do this is to use a common metal...
The In the laboratory a "coffee cup calorimeter, or constant pressure calorimeter, is frequently used to determi...
The In the laboratory a "coffee cup calorimeter, or constant pressure calorimeter, is frequently used to determine the specific heat of a solid, or to measure the energy of a solution phase reaction. A student heats 61.44 grams of titanium to 97.72 °C and then drops it into a cup containing 83.69 grams of water at 21.75 °C. She measures the final temperature to be 27.96 °C. The heat capacity of the calorimeter (sometimes referred to as the calorimeter constant)...
The In the laboratory a "coffee cup" calorimeter, or constant pressure calorimeter, is frequently used to...
The In the laboratory a "coffee cup" calorimeter, or constant pressure calorimeter, is frequently used to determine the specific heat of a solid, or to measure the energy of a solution phase reaction. Sing a Since the cup itself can absorb energy, a separate experiment is needed to determine the heat capacity of the calorimeter. This is known as calibrating the calorimeter and the value determined is called the calorimeter constant. One way to do this is to use a...
In the laboratory a "coffee cup" calorimeter, or constant pressure calorimeter, is frequently used to determine the specific heat of a solid, or to measure the energy of a solution phase reaction Since the cup itself can absorb energy, a separate experiment is needed to determine the heat capacity of the calorimeter. This is known as calibrating the calorimeter and the value determined is called the calorimeter constant Water One way to do this is to use a common metal...
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