<u>Given</u> :
- Amount = 20 kg
- Heat energy absorbed = 237,000 J
- Temperature change = 15 °C
<u>Formula applied</u> :
![\boxed {Q = mc \triangle T}](https://tex.z-dn.net/?f=%5Cboxed%20%7BQ%20%3D%20mc%20%5Ctriangle%20T%7D)
- Q = absorbed heat
- m = mass
- c = specific heat capacity
- ΔT = temperature change
Let's solve for c !
⇒ 237,000 = 20 × c × 15
⇒ c = 237,000 ÷ 300
⇒ ![\boxed {c = 790 J kg^{-1} K^{-1}}](https://tex.z-dn.net/?f=%5Cboxed%20%7Bc%20%3D%20790%20J%20kg%5E%7B-1%7D%20K%5E%7B-1%7D%7D)
∴ The specific heat capacity of granite is <u>790 J kg⁻¹ K⁻¹</u>.
Answer:
7.7×10^-6
Explanation:
CoCO3(s)<--------> Co^2+(aq) + CO3^2-(aq) Ksp= 1.0 ×10 ^-10
Co^2+(aq) + 6NH3(aq) <-----------> [Co(NH3)6]^2+. Kf = 7.7×10^4
Overall:
CoCO3(s) + 6NH3(aq) <--------> [Co(NH3)6]^2+(aq) + CO3^2-(aq) Knet= Ksp× Kf
Knet= Ksp× Kf = 1.0 ×10 ^-10 ×7.7×10^4= 7.7×10^-6
The insoluble CoCO3 dissolves in the presence of ammonia because bof the formation of hexamine cobalt II complex ion.
The most abundant element in the Sun and in the stars are hydrogen and helium. Like most of the stars, there is a spontaneous radioactive reaction happening in the Sun. Hydrogen is transformed into Helium. As long as the stars are young, the most abundant element is hydrogen.
Answer:
![\rho =1.96\frac{g}{L}](https://tex.z-dn.net/?f=%5Crho%20%3D1.96%5Cfrac%7Bg%7D%7BL%7D)
Explanation:
Hello there!
In this case, since this imaginary gas can be modelled as an ideal gas, we can write:
![PV=nRT](https://tex.z-dn.net/?f=PV%3DnRT)
Which can be written in terms of density and molar mass as shown below:
![\frac{P}{RT} =\frac{n}{V} \\\\\frac{P}{RT} =\frac{m}{MM*V}\\\\\frac{P*MM}{RT} =\frac{m}{V}=\rho](https://tex.z-dn.net/?f=%5Cfrac%7BP%7D%7BRT%7D%20%3D%5Cfrac%7Bn%7D%7BV%7D%20%5C%5C%5C%5C%5Cfrac%7BP%7D%7BRT%7D%20%3D%5Cfrac%7Bm%7D%7BMM%2AV%7D%5C%5C%5C%5C%5Cfrac%7BP%2AMM%7D%7BRT%7D%20%3D%5Cfrac%7Bm%7D%7BV%7D%3D%5Crho)
Thus, by computing the pressure in atmospheres, the resulting density would be:
![\rho = \frac{165/760 atm * 314.2 g/mol}{0.08206\frac{atm*L}{mol*K}*425K} \\\\\rho =1.96\frac{g}{L}](https://tex.z-dn.net/?f=%5Crho%20%3D%20%5Cfrac%7B165%2F760%20atm%20%2A%20314.2%20g%2Fmol%7D%7B0.08206%5Cfrac%7Batm%2AL%7D%7Bmol%2AK%7D%2A425K%7D%20%5C%5C%5C%5C%5Crho%20%3D1.96%5Cfrac%7Bg%7D%7BL%7D)
Best regards!
A solute dissolves in excess solvent to form a solution:
solute + solvent → solution
<h3>What is the Enthalpy and their relation ? </h3>
A thermodynamic system's enthalpy, which is one of its properties, is calculated by adding the system's internal energy to the product of its pressure and volume. It is a state function that is frequently employed in measurements of chemical, biological, and physical systems at constant pressure, which the sizable surrounding environment conveniently provides.
A solution is a uniform mixture of two or more components that can exist in the solid, liquid, or gas phases. The amount of heat that is released or absorbed during the dissolving process is known as the enthalpy change of solution (at constant pressure).
There are two possible values for this enthalpy of solution ( H solution ) : positive (endothermic) and negative (exothermic). It is most straightforward to visualize a hypothetical three-step process occurring between two substances while trying to grasp the enthalpy of solution. The solute is one substance; let's call it A. The solvent is the second component; let's call it B.
The initial procedure exclusively affects the solute A and calls for disabling all intramolecular forces holding it together. This indicates that the molecules of the solute separate. This process' enthalpy is known as H1. Since breaking interactions requires energy, this is always an endothermic process, hence H1>0.
Their sign will be opposite.
To know more about Enthalpy please click here : brainly.com/question/14047927
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