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).

hydrocarbons are organic compounds that contain only hydrogens and carbons. they can be saturated (those which contain only carbon-carbon single bonds) or unsaturated (those which contain carbon-carbon double or triple bonds) in nature. hydrocarbons can undergo several reactions like substitution, elimination etc.  

on substituting one or more hydrogen atoms in hydrocarbon it results in the formation of haloalkane. as the halogen atoms are large compared to the carbon and hydrogen atoms, due to which the molecular weight increases and the bond become polar because of presence electronegative halogen atom and results in the increase in boiling point of the haloalkane.

thus, the correct option is (b) that is the boiling point of the new compound increases on substituting a hydrogen atom with a halogen in a hydrocarbon.

points

explanation: