If we takes 11. 2 kj of energy to raise the temperature of 145 g of benzene from 23. 0°c to 68. 0°c, then the specific heat of benzene is
1716.475 J/kg.°C.
Specific Heat capacity is given as
Q = cm(t₂-t₁) ................
Where Q = quantity of heat, c = specific heat of benzene, m = mass of benzene, t₁ = initial temperature, t₂ = final temperature.
=
Given:
Substitute into equation 2.
Hence the specific heat of benzene =
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The reaction quotient will be half of the equilibrium constant of the system.
<h3>Equilibrium constant</h3>
The term equilibrium constant refers to a number that shows the extent to which reactants are converted to products when the reaction has attained equilibrium. If the system is not at equilibrium, the number is called the reaction quotient.
If the reaction system is diluted to about twice its original volume, it follows that the reaction quotient will be halved with respect to the equilibrium constant hence the most likely value of the equilibrium constant is about half of the equilibrium constant.
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We can use two equations for this problem.<span>
t1/2 = ln
2 / λ = 0.693 / λ
Where t1/2 is the half-life of the element and λ is
decay constant.
20 days = 0.693 / λ
λ = 0.693 / 20 days
(1)
Nt = Nο eΛ(-λt) (2)
Where Nt is atoms at t time, No is the initial amount of substance, λ is decay constant and t is the time
taken.
t = 40 days</span>
<span>No = 200 g
From (1) and (2),
Nt = 200 g eΛ(-(0.693 / 20 days) 40 days)
<span>Nt = 50.01 g</span></span><span>
</span>Hence, 50.01 grams of isotope will remain after 40 days.
<span>
</span>
Conduction
Explanation:
Stirring a pot with a metal spoon thereby making the spoon hot in the hand is a mode of heat transfer called conduction.
Heat is form of energy that causes differences in temperature between two bodies.
- There are three modes of heat transfer which are conduction, convection and radiation.
- Radiation is a form of heat transfer that does not involve a material medium.
- Convection is heat transfer in fluids that involves movement of the materials of the medium.
- Conduction is a mode of heat transfer in solids that involves movement of the materials of the medium.
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Answer:
Helo
titik dari mana berat badan atau sistem boleh dianggap bertindak. Dalam graviti seragam ia sama dengan pusat jisim. Contoh pusat graviti adalah bahagian tengah gergaji besi.
saya harap ini dapat membantu anda :)
Explanation: