Got 2 kettle .one got hot water only and the other one got hot water+tea .which kettle got higher boiling points?

The kettle with hot water only.

Explanation:

Adding tea to hot water reduces the attractive forces between water molecules therefore the water molecules in hot water plus tea will move away from each other faster hence hastening the boiling point.

Kettle with hot water + tea.

Explanation:

Pure water boils at 100 degree Celsius, water containing dissolved solvents has a higher boiling point than the pure water (solvent). This is due to the fact that any liquid boils only when its vapour pressure becomes equal to the vapour pressure of the surrounding.

For a solvent, the presence of a nonvolatile solute decreases its vapor pressure by dilution of solvent molecules which in turn requires more energy in order to achieve that vapour pressure.

answer: 802.3 kilo joules of energy represents 191.75 kilo calorie of energy.

explanation:

energy released during combustion of one mole methane = 802.3 kilo joules

if 1 kilo joule = 0.239006   kilo calorie

then ,802.3 kilo joule will be = 802.30.239006 kilo calorie

802.3 kilo joule = 191.75 kilo calorie

hence, the energy in kilo calorie is 191.75 kilo calorie.

a lot of it means it can be "burned" for energy and sold at one price. if it is scarce, the price will go up