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algol [13]
4 years ago
13

SUPPLEMENTARY QUESTION

Chemistry
2 answers:
bearhunter [10]4 years ago
7 0
I think (I’m pretty positive) the answer would be 850
sergiy2304 [10]4 years ago
3 0

Answer:

850 Calories.

Explanation:

The following data were obtained from the question:

Mass (M) = 50 g

Initial temperature (T1) = 20 °C

Final temperature (T2) = 37 °C

Specific heat capacity (C) of water = 1 cal/g°C

Heat absorbed (Q) =..?

Next, we shall determine the change in temperature of water.

This can be obtained as follow:

Initial temperature (T1) = 20 °C

Final temperature (T2) = 37 °C

Change in temperature (ΔT) =..?

Change in temperature (ΔT) = T2 – T1

Change in temperature (ΔT) = 37 – 20

Change in temperature (ΔT) = 17 °C

Finally, we shall determine the heat absorbed. This can be obtained as follow:

Mass (M) = 50 g

Specific heat capacity (C) of water = 1 cal/g°C.

Change in temperature (ΔT) = 17 °C

Heat absorbed (Q) =..?

Q = MCΔT

Q = 50 x 1 x 17

Q = 850 Calories

Therefore, the heat absorbed is 850 Calories.

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Explanation:

Entropy is the measure of randomness or disorder of a system. If a system moves from  an ordered arrangement to a disordered arrangement, the entropy is said to decrease and vice versa.

\Delta S is positive when randomness increases and \Delta S is negative when randomness decreases.

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For a cold pack, the energy has to be absorbed for the dissolution of ammonium nitrate in water so that the surroundings feel cold.Thus as energy is absorbed, \Delta H for the reaction comes out to be positive.

The solid form of ammonium nitrate is getting converted to ions and thus entropy increases and thus \Delta S for the reaction comes out to be positive.

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4 years ago
11. Name 3 sources of CO2.
barxatty [35]

Answer:

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Gas or methane hydrates in the arctic tundra show increasing promise as a limited energy supply for which two of these countries
vredina [299]

Answer:

The correct answer is option D. "Russia and Canada".

Explanation:

Russia and Canada are countries with extensive areas of arctic tundra conditions. These two countries could use these areas as a source of gas or methane hydrates since it have been demonstrated that tundra is rich in these gasses, which are trapped inside the ice. Unfortunately methane is a powerful greenhouse gas, and its release to the atmosphere is an environmental concern that rises from the climate change phenomena.

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3 years ago
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3 years ago
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https://www.coursehero.com/file/17953660/VHS-CHEM-L3-L4-S2-02-04-lab-report-GAdoc/
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3 years ago
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