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Sunny_sXe [5.5K]
3 years ago
11

What is the wavelength of the matter wave associated with an electron (me= 9.1 x 10-31 kg) moving with a speed of 2.5 x 107 m/s?

Chemistry
1 answer:
riadik2000 [5.3K]3 years ago
3 0
And h value is constant 6.624 x 10^-34

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A system gains 687 kJ of heat, resulting in a change in internal energy of the system equal to 156 kJ. How much work is done?
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Answer:

w = -531 kJ

1. Work was done by the system.

Explanation:

Step 1: Given data

  • Heat gained by the system (q): 687 kJ (By convention, when the system absorbs heat, q > 0).
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Step 2: Calculate the work done (w)

We will use the following expression.

ΔU° = q + w

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w = 156 kJ - 687 kJ

w = -531 kJ

By convention, when w < 0, work is done by the system on the surroundings.

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