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

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

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.

⇒ This is not true

D.

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).

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