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Explain what it means for a reaction to be endothermic and what would happen to the temperature recorded by a thermometer in an endothermic reaction?
Wiki User
∙ 9y ago
An endothermic reaction absorbs heat energy from the system. In an endothermic reaction a thermometer measuring the reactants and products would register a decrease in temperature.
Wiki User
∙ 9y ago
Wiki User
∙ 14y agoIt does mean that the reactants have less energy (enthalpy) than the products, so the reaction will need an external source of heat to take place.
Wiki User
∙ 12y agodescribe the chemical reaction that ceates tinting effect
Wiki User
∙ 13y agothe chemical reaction makes it cold
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Does an exothermic reaction contain more chemical energy than reactants?
depends , if the reaction is endothermic or exothermic. if the reaction is endothermic , the energy needed to break the bonds is greater than the energy that forms bonds.and to break bonds you need thermal energy , meanwhile forming bonds gives off energy. now if the reaction is exothermic the energy given off the bonds form are greater than the enrgy needed to break them. you know if the reaction is exothermic or endothermic because exothermic have a negitave delta next to d eqn.while endothermic have a positive delta.
In two or more complete sentences explain to someone who knows nothing about heat transfer how to construct and use a constant pressure calorimeter.?
It is a very simple device; basically it can be made from two styrofoam cups, a stirrer and a thermometer. Placing the two styrofoam cups inside each other (for insulation), a chemical reaction in a liquid medium (typically water) is performed in the inner cup, and the change in temperature recorded.
What is the slowest rate of reaction ever recorded?
carbon reacts with oxygen
What is a thermometric well?
Ans. Thermometric Well Fig. 3.6 shows an arrangement which is used to measure the temperature of gas flowing through a pipeline. A small tube called thermometric well is welded radially into the pipeline.The well is partially filled with some liquid and the thermometer is immersed into this liquid. When the temperature of the gas flowing through the pipeline is higher than the ambient temperature, the heat flows from the hot gases towards the tube walls along the well.This may cause temperature at the bottom of well to become colder than the gas flowing around. Obviously the temperature indicated by the thermometer will not be the true temperature of the gas. The error in the temperature measurement is estimated with the help of the theory of fins.The protective tube (well) can be considered as a hollow fin (internal diameter d,thickness ö and length 1), and the temperature distribution obtained by using the relation applicable to a fin with tip insulated:where is the temperature of the pipe wall, ta is the temperature of hot gas or air flowing through the pipeline, and is the temperature at any distance x measured from pipe wall along the thermometric well.If x = 1 then,where t1 is the temperature recorded by the thermometer at the bottom of well and represents error in temperature measurement.The perimeter of the protective well P = and its cross-sectional area Therefore,then,
How do you use exothermic change in a sentence?
Jack recorded the exothermic change as the reaction progressed
Why is it best to take temperature readings in the shade?
A thermometer is not kept in direct sunlight because the temperature needed to be recorded by the thermometer is of the air and not the rays of the sun.
How does the kink in a mercury or alcohol work in a clinical thermometer?
The kink stops the mercury from falling, giving the user/reader of the thermometer time to read the highest temperature recorded. Shaking the thermometer lets the mercury fall again.
Does digital thermometer has kink?
No need for such kink since the maximum temperature sensed could be recorded and can be seen at any time.
What is the highest temperature british Columbia has ever had?
The highest temperature ever recorded in BC was 44.4C in Lillooet and Lytton simultaneously on July 16th, 1941. Today, in Pemberton, our thermometer recorded 43C in the shade. The end is near.
What is thermometer and how is used?
A thermometer is an instrument used to measure temperate. They can be used for outdoor purposes or to see if someone is running a fever. They are found virtually anywhere where temperature needs to be recorded.
Why is lab thermometer can't be used as clinical and vice - varsa?
A clinical thermometer typically shows a maximum reading while a lab thermometer typically shows the temperature right now. When you take a thermometer out of a patients mouth (or other place that you are measuring the temperature) you most often want the maximum temperature to keep showing until you reset the instrument. When using a lab oratory thermometer you want the instrument to react as quickly as possible so that changes (up and down) can be noticed and recorded.
What was the hottest day ever in Tampa FL?
The coldest recorded temperature was -2° F on 13 February 1899 in Tallahassee.
Will the recorded temperature change for an exothermic reaction performed in a glass calorimeter be greater or less that?
The recorded temperature change for an exothermic reaction performed in a glass calorimeter is less than the Styrofoam cup calorimeter. This is because the glass will conduct heat away more than the Styrofoam.
When was the earliest recorded temperature?
Various authors have credited the invention of the thermometer to Abū Alī ibn Sīnā (usually known as Avicenna), Cornelius Drebbel, Robert Fludd, Galileo Galilei or Santorio Santorio. But the thermometer was not a single invention, it was a development. The 11th Century was the first official temperature recording.
Why is thermometer usually shakes before using?
It isn't necessary with new electronic thermometers, but if you still have an old hold-under-your-tongue-for-three-minutes mercury thermometer, the mercury will remain at the last recorded temperature until it is shaken back into the reservoir.
Are the reaction-rate changes recorded in Table 11.4 consistent with the rule of thumb concerning the effect of a 10oC temperature increase on the rate of reactions?
no
Does an exothermic reaction contain more chemical energy than reactants?
depends , if the reaction is endothermic or exothermic. if the reaction is endothermic , the energy needed to break the bonds is greater than the energy that forms bonds.and to break bonds you need thermal energy , meanwhile forming bonds gives off energy. now if the reaction is exothermic the energy given off the bonds form are greater than the enrgy needed to break them. you know if the reaction is exothermic or endothermic because exothermic have a negitave delta next to d eqn.while endothermic have a positive delta.
