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Anna11 [10]
3 years ago
9

A vertical piston-cylinder device contains water and is being heated on top of a range. During the process, 10 kJ of heat is tra

nsferred to the water, and heat losses from the side walls amount to 80 J. The piston rises as a result of evaporation, and 2 J of work is done by the vapor. Determine the change in the energy of the water for this process.
Engineering
1 answer:
grigory [225]3 years ago
6 0

Answer: 9.9KJ

Explanation: Q = U + W + losses

Q is heat transfered to the water

U is the change in energy of the system

W is work done by the system = 2J

Losses = 80J

Heat into system is 10kJ = 10000KJ

Therefore

U = Q - W - losses

U = 10000 - 2 - 80 = 9990J

= 9.9kJ

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Write a statement that calls the recursive method backwardsAlphabet() with parameter startingLetter.
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6 0
1 year ago
What is the activation energy (Q) for a vacancy formation if 10 moles of a metal have 2.3 X 10^13 vacancies at 425°C?
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Answer:

Activation\ Energy=2.5\times 10^{-19}\ J

Explanation:

Using the expression shown below as:

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Given that:

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The conversion of T( °C) to T(K) is shown below:

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So,  

T = (425 + 273.15) K = 698.15 K  

T = 698.15 K

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