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RSB [31]
3 years ago
15

What is the minimum mass of 25°c water required to melt all 35.1 g of ice?

Chemistry
1 answer:
inn [45]3 years ago
5 0
ΔH fusion of water is 6.0 kJ/mol
mass of ice = 35.1 g
Molecular weight of water = 18.015 g / mole
number of moles of water = 35.1 / 18.015 = 1.95 mole
amount of heat required to melt ice = moles * Δ H fusion = 1.95 x 6 =11.7 kJ
mass of water at 25°C required to get this energy to a temperature 0°C
q = m C ΔT 
11700 J = m * 4.184 * (25°- 0°)
m = 111.85 g  

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Weather and erosion.

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In Geography, weathering is the process of breaking down of rocks, minerals and soil as a result of contact with water, earth's atmosphere, acid, ice, plants and animals. The breaking up of the rocks by weathering weakens it and makes it susceptible to erosion.

Erosion in geography is the movement of rocks and sediments to another place by water, wind and ice.

For instance, In many parts of the Cross Timbers and Prairies ecoregion, the Brazos river has formed tall, steep cliffs in the rock along its banks through the processes of weathering and erosion.

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(a) Sketch, in a cubic unit cell, a [111] and a [112] lattice direction. (b) Use a trigonometric calculation to determine the an
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Answer and Explanation:

a) The direction is shown in the cube diagram attached to this solution.

b) the angle between two planes (h₁, k₁, l₁) and (h₂, k₂, l₂) is given by the formula,

Cos Φ = (h₁h₂ + k₁k₂ + l₁)/√((h₁² + k₁² + l₁²)(h₂² + k₂² + l₂²))

For (111) and (112)

Cos Φ = (1.1 + 1.1 + 1.2)/√((1² + 1² + 1²)(1² + 1² + 2²))

Cos Φ = (1 + 1 + 2)/√((1+1+1)(1+1+4))

Cos Φ = 4/√(3×6)

Cos Φ = 4/√18

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c) equation 3.3 is missing from the question, I would be back to provide the answers to that as soon as the equation is provided!

Hope this Helps!!

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