Chemistry, 09.01.2020 04:31 superfly903

If the specific heat of aluminum is 899 j/kg °c and the specific heat of water is 4190 j/kg °c, which of the following statements is true?
a.
it takes more energy to heat 1 kg of water 1°c than it does to heat the same amount of aluminum.
b.
it takes more energy to heat 1 kg of aluminum 1°c than it does to heat the same amount of water.
c.
it is impossible to heat water to a high temperature because it requires too much energy.
d.
aluminum produces more energy than water does when it is heated.
re

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Answer from: grales65

it takes more energy to heat 1 kg of water 1°C than it does to heat the same amount of aluminum. (Option A).

Explanation:

Step 1: Data given

Specific heat of aluminium = 899 J/kg °C

Specific heat of water = 4190 J/kg°C

A. It takes more energy to heat 1 kg of water 1°C than it does to heat the same amount of aluminum.

Q = m*c*ΔT

Q(al) = 1kg * 899 J/kg°C* 1°C = 899 J

Q(H2O) = 1kg * 4190 J/kg°C * 1°C = 4190 J

⇒ This is true

It takes more energy to heat 1 kg of aluminum 1°C than it does to heat the same amount of water.

It is impossible to heat water to a high temperature because it requires too much energy.

⇒ This is not true

Aluminum produces more energy than water does when it is heated.

⇒ Aluminium produces less energy than ater when it's heated

The specific heat of aluminium is 899 J/kg°C, this means it requires 899 joules of heat to heat 1kg of aluminium for 1°C

The specific heat of water is 4190 J/kg°C, this means it requires 4190 joules of heat to heat 1kg of water for 1°C

This means it takes more energy to heat 1 kg of water 1°C than it does to heat the same amount of aluminum. (Option A).

Answer from: Quest

For cyclohexane compounds drawn in a chair conformation: -axial bonds are vertical -equatorial bonds are parallel to two bonds within the ring. thus, as i assume the chair conformation is drawn: -the x group is in an axial position, as are the five other vertical bonds. -three axial bonds are on the top face of the ring -the other three axial bonds are on the bottom face the position of the second substituent on each ring carbon is equatorial. gauche groups must be on an adjacent carbon such as carbon 6 and carbon 2, and also gauche groups are rotated by 60 degrees relative to each other. drawing the newman projections for c1–c2 and c1–c6 aids in visualizing the groups that are gauche to the y group on c1. click this link and watch some academic videos that may you more understand the topic

Answer from: Quest

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If the specific heat of aluminum is 899 j/kg °c and the specific heat of water is 4190 j/kg °c, whic...

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