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Setler79 [48]
2 years ago
7

Explain why “advancing water contact angles are more sensitive to the hydrophobic property of a surface whereas receding water c

ontact angles are more sensitive to the hydrophilic property of a surface”.
Chemistry
1 answer:
timama [110]2 years ago
7 0

Answer: Surface tension has a more complicated effect on capillary pressure: on the one hand, capillary pressure is directly proportional to surface tension. High surface tension liquids, on the other hand, typically have higher contact angles, which lowers capillary pressure.

Explanation: Does this help??

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During the combustion of a peanut that weighed 0.341 g, the temperature of the 100 mL of water in the calorimeter rose from 23.4
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Answer:

119 kCal per serving.

Explanation:

The heat energy necessary to elevates water's temperature from 23.4°C to 37.9°C can be calculated by the equation below:

Q = mcΔT

Q: heat energy

m: mass in g

c: specific heat capacity in cal/g°C

ΔT = temperature variation in °C

m is the mass of water, considering the density of water to be 1g/mL, 100 mL of water weights  100g. Therefore:

Q = 100 g x 1.00 cal/g°C x (37.9 - 23.4)°C

Q = 1450 cal

1450 cal ____ 0.341 g peanuts

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x = 119061.58 cal

This means that the cal from fat per serving of peanuts is at least 119 kCal.

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Explanation:

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