Does that make sense? I believe that’s what it is asking for.
Answer : The specific heat of tungsten is, ![0.139J/g^oC](https://tex.z-dn.net/?f=0.139J%2Fg%5EoC)
Explanation :
In this problem we assumed that heat given by the hot body is equal to the heat taken by the cold body.
![q_1=-q_2](https://tex.z-dn.net/?f=q_1%3D-q_2)
![m_1\times c_1\times (T_f-T_1)=-m_2\times c_2\times (T_f-T_2)](https://tex.z-dn.net/?f=m_1%5Ctimes%20c_1%5Ctimes%20%28T_f-T_1%29%3D-m_2%5Ctimes%20c_2%5Ctimes%20%28T_f-T_2%29)
where,
= specific heat of tungsten = ?
= specific heat of water = ![4.18J/g^oC](https://tex.z-dn.net/?f=4.18J%2Fg%5EoC)
= mass of tungsten = 19.5 g
= mass of water = 78.5 g
= final temperature = ![23.20^oC](https://tex.z-dn.net/?f=23.20%5EoC)
= initial temperature of tungsten = ![97.80^oC](https://tex.z-dn.net/?f=97.80%5EoC)
= initial temperature of water = ![22.58^oC](https://tex.z-dn.net/?f=22.58%5EoC)
Now put all the given values in the above formula, we get
![19.5g\times c_1\times (23.20-97.80)^oC=-78.5g\times 4.18J/g^oC\times (23.20-22.58)^oC](https://tex.z-dn.net/?f=19.5g%5Ctimes%20c_1%5Ctimes%20%2823.20-97.80%29%5EoC%3D-78.5g%5Ctimes%204.18J%2Fg%5EoC%5Ctimes%20%2823.20-22.58%29%5EoC)
![c_1=0.139J/g^oC](https://tex.z-dn.net/?f=c_1%3D0.139J%2Fg%5EoC)
Therefore, the specific heat of tungsten is, ![0.139J/g^oC](https://tex.z-dn.net/?f=0.139J%2Fg%5EoC)
Answer:
Argon
Explanation:
The average kinetic energy of the particles in a gas is given by
![KE=\frac{1}{2}mv^2](https://tex.z-dn.net/?f=KE%3D%5Cfrac%7B1%7D%7B2%7Dmv%5E2)
where
m is the mass of the particles
v is their rms speed
The average kinetic energy of the particles in a gas can also be written as
![KE=\frac{3}{2}kT](https://tex.z-dn.net/?f=KE%3D%5Cfrac%7B3%7D%7B2%7DkT)
where
k is the Boltzmann's constant
T is the absolute temperature of the gas
Combining the two equations,
![\frac{1}{2}mv^2=\frac{3}{2}kT](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B2%7Dmv%5E2%3D%5Cfrac%7B3%7D%7B2%7DkT)
We can re-write the equation as
![v=\sqrt{\frac{3kT}{m}}](https://tex.z-dn.net/?f=v%3D%5Csqrt%7B%5Cfrac%7B3kT%7D%7Bm%7D%7D)
We see that:
- The speed is directly proportional to the square root of the temperature
- The speed is inversely proportional to the square root of the mass of the particles
Therefore, if the two gases are at same temperature, the particles will move faster in the gas with lighter particles (smaller mass).
Since Krypton atoms have larger mass than Argon atoms, it means that atoms in Argon move faster than in Krypton.
1. 254 cal = 1,062.736 joules
2. 126 cal = 527.184 joules
3. 98 cal = 410.032 joules
4. 704 cal = 2,945.536 joules
5. 682 cal = 2,853.488 joules
Answer: B-- the length of the chain and degree of cross-linking.
Explanation: Silicones can be oils or rubber-like materials depending on ___the length of the chain and degree of cross-linking.____
Silicone rubber is an elastomer which is composed of silicone containing silicon together with carbon, hydrogen, and oxygen. silicone rubber can be found in a wide variety of products because of its ability to withstand very high temperatures and pressures. eg cooking and food storage products; clothing apparels , automotive devices etc while
Silicone oil is a linear chain siloxane repeating units Si--0 with radical side group as such as methyl, phenyl etc bonded to it. They are oils because of they are viscose and have ability to repel. Silicone oils are mostly employed in medicine for surgical tools.