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Soloha48 [4]
2 years ago
11

When an endothermic chemical reaction (the system) occurs inside a calorimeter containing water (the surroundings) and no heat e

scapes from the calorimeter, which of the following statements is true?
a. Heat flows from the system to the surroundings and the temperature of the water increases.
b. Heat flows from the surroundings to the system and the temperature of the water decreases.
c. Heat flows from the system to the surroundings and the temperature of the water decreases.
d. Heat flows from the surroundings to the system and the temperature of the water increases.
Chemistry
1 answer:
Nostrana [21]2 years ago
8 0

Answer:

b. Heat flows from the surroundings to the system and the temperature of the water decreases.

Explanation:

The laws of thermodynamics lets us know that energy is neither created nor destroyed but can be converted from one form to another. Also, energy transfer does accompany chemical reactions in the form of heat.

For an endothermic reaction, heat is absorbed by the system from the surroundings. This leads to a drop in the temperature of the surroundings as energy is removed.

This implies that the water temperature decreases.

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riadik2000 [5.3K]
The mass of the air in the room is 50 kg.

V = lwh = 15.5 ft × 12.5 ft × 8 ft = 1550 ft³

1 ft = 12 in × \frac{2.54 cm}{1 in} = 30.48 cm

V = 1550 ft³ ×(\frac{30.48 cm}{1 ft})^{3} = 4.39 × 10⁷ cm ³ = 4.39 × 10⁷mL = 4.39 × 10⁴ L

Mass = 4.39 × 10⁴ L × \frac{1.119 g}{1 L} = 5.22 × 10⁴ g = 52.2 kg

Note: The answer can have only 1 significant figure, because that is all you gave for the height of the room.

To the correct number of significant figures, the mass of the air in the room is 50 kg.
6 0
3 years ago
How many grams of glucose are in 11.5 moles?
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There are 2071.4662 grams of glucose in 11.5 moles.

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5 0
3 years ago
What is a mole?
leva [86]
It's hard to relate a mole to carbon or sulfur. Imagine if I walked up to you and said, "What's the relation between a dozen and donuts?"

A mole is a form of measurement for atoms, more specifically, 6.02 * 10^23 atoms. I suppose you could relate it to Carbon or Sulfur, since the number of atoms of each are usually measured in moles.

Carbon and Sulfur don't have a set number of moles (Just like donuts don't have to be a dozen), so it's hard to answer your second question.
In the atomic table, the number you see under the element is the molar mass, which is the weight of an a mole of the element. In this way, I guess there's a mole of Carbon and Sulfur present, if we're looking at the periodic table.

-T.B.
8 0
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What type of isomerism is shown by alkanes
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Answer:

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Explanation:

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A certain automobile contains 4 tires, 2 headlights, 1 steering wheel,
Step2247 [10]

Answer:

143 parts I think probably not

5 0
2 years ago
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