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Why the experimental value of specific heat capacity of water is higher than the standard value?
Wiki User
∙ 13y ago
Wiki User
∙ 12y agoDefinitely less than the actual reading due to the heat lost to the surrounding. The equation:
mcO = VIt
from the equation, you will know that if change in temperature, O greater than the actual value (meaning that heat lost to the surrounding), the specific heat capacity that you calculated from your gradient will more than the standard reading.
P/s:
O = change in temperature (because I cannot find the symbol for it)
Wiki User
∙ 13y agoThe theoretical and experimental values for the heat capacity of lead actually do agree, as long as you take quantum mechanics into consideration. The classical theory starts to fail as temperatures get lower and lower. Here's why that happens.
Temperature is the average kinetic energy of all of the atoms within the system you're measuring. There's several ways for this kinetic energy to actualize; including translational motion, rotational motion, and vibrational motion. Therefore, when you theoretically calculate the amount of heat it takes to raise the temperature of something by one degree (that's what heat capacity is), you have to take into account every possible way that the newer, higher-energy atoms can move about. The number of possible ways that something can move about in a system is called the degrees of freedom for that system.
Classically, all of this was known, but one thing wasn't known: energy is discrete, or quantized, implying that there are only certain, specific values of kinetic energy that a heated up atom can jump to, as opposed to continuous values as was thought classically. That means that many of the degrees of freedom that were previously calculated to have been possible, aren't, since the atom isn't allowed to have many of those energies.
This revelation isn't really noticeable at high temperatures, because quantized or not, there's a lot of degrees of freedom to populate so the quantum model generalizes back out to the classical model. This is analogous to the number of modes in a harmonic oscillator: as you increase energy, the wave's frequency gets higher and higher, creating progressively more and more modes.
At low temperatures, this effect can be very noticeable, especially when the atom's temperature is dropped to the same scale as the value of the energy quanta itself. Think about it, if the energy of the atom is that low, there's only going to be a small number of allowed states for the atom to populate (remember, the amount of energy used by the atom has a minimum, discrete value). Therefore, if you use the classical heat capacity formula for continuous states, you're going to arrive at a far larger number than you'll actually see in the experiment since the degrees of freedom for a discrete, countable set are far less than those of a continuous set, i.e. adding up a finite amount of numbers between two points will give you a lower total than if you add up an infinite amount of numbers between those same two points.
Wiki User
∙ 13y agoChemistry is a load of Sh*t, don't bother, just leave it :)
Wiki User
∙ 11y agoImpurities lower the specific heat capacity of water.
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Does hydrogen or water has high specific heat capacity?
Water has a MUCH higher specific heat than hydrogen.
What is the specific heat capacity of jam?
The specific heat capacity is the energy density of a substance. Since jam has a higher specific heat capacity than the pie crust it is contained in, this is why the contents of a pie are always much hotter than the pie itself.
Which substance having high specific heat capacity?
A common substance with a high specific heat is water. There are a few substances that have a higher heat capacity than water, though, such as lithium and ammonia.
Why aluminum can store more heat than iron?
yes
If a substance has a specific heat less than one would it take more or less heat to raise the temperature?
The higher the substance's specific heat capacity, the more heat energy is needed to raise it's temperature.
Why the experimental value of specific heat capacity is higher than the standars value?
Experimental errors would cause the experimental value of specific heat capacity to be higher than the standard value.
Would it be better to have pots and pans made from material with a high specific heat capacity or low specific heat capacity?
Higher Heat
Does hydrogen or water has high specific heat capacity?
Water has a MUCH higher specific heat than hydrogen.
What is the specific heat capacity of jam?
The specific heat capacity is the energy density of a substance. Since jam has a higher specific heat capacity than the pie crust it is contained in, this is why the contents of a pie are always much hotter than the pie itself.
Is soil the highest specific heat capacity?
Water has a higher Specific Heat than soil. The very highest is ammonia.
Does a higher specific heat capacity mean that something will cool down faster?
sure :D
Which is true for a counterbalance lift truck the higher the lift height?
Height does not affect capacity.
Which substance having high specific heat capacity?
A common substance with a high specific heat is water. There are a few substances that have a higher heat capacity than water, though, such as lithium and ammonia.
Does aluminum have a higher specific heat capacity then lead?
no because the molar mass of lead is great than aluminum
Why you feel cool in the mouth when you eat halls?
the specific heat capacity of hals is less then the specific heat capacity of our mouth, so the heat transfer form higher heat to lower heat, so we get coll while eating hals.
Why does land become hot faster than a body of water?
Water heats slower because it has a higher specific heat capacity.
Why is blueberry pie filling hoter than the crust?
The specific heat capacity of the pie filling is higher than the specific heat capacity of the pie crust; therefore, the pie filling cools down after being removed from the oven much slower than the pie crust.
