A container of gas is heated from 250 K to 303 K. What is the new pressure if the initial pressure is 880 kPa? (Assume constant
1 answer:
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Answer:
Here's what I get
Explanation:
(a) Mass % of each ion
I used this template to calculate the percentages in the table below.
<u> Ion Abundance Mass % </u>
Na⁺ 10 560 30.72
K⁺ <u> 380 </u> <u> 1.11 </u>
Alkali metals 10 940 31.82
Mg²⁺ 1 270 3.69
Ca²⁺ <u>400 </u> <u> 1.16 </u>
Alkaline earth metals <u>1 670 </u> <u> 4.86 </u>
Total metal ions 12 610 36.68
Cl⁻ 18 980 55.20
SO₄²⁻ 2 650 7.71
HCO₃⁻ 140 0.41
Anions <u>21 770 </u> <u> 63.32 </u>
TOTAL 34 380 100.00
(b) 30.72 % of the total mass is sodium ion.
(c) Alkaline earth metals vs alkali metals
The mass percent of alkali metal ions is 6.55 times that of alkaline earth metal ions.
(d) The mass of anions is greater than that of cations.
Answer:
The specific heat of the alloy
Explanation:
Mass of an alloy = 25 gm
Initial temperature = 100°c = 373 K
Mass of water = 90 gm
Initial temperature of water = 25.32 °c = 298.32 K
Final temperature = 27.18 °c = 300.18 K
From energy balance equation
Heat lost by alloy = Heat gain by water
[
-
] =
(
-
)
25 × × ( 373 - 300.18 ) = 90 × 4.2 (300.18 - 298.32)
This is the specific heat of the alloy.