IS1 - Units of Energy/ Energy Conversions

Front

What is an exothermic reaction?

Back

An exothermic reaction is a chemical reaction that releases energy in the form of heat. In this type of reaction, the reactants have more energy than the products.

Front

How do you convert calories to Joules?

Back

To convert calories to Joules, use the conversion factor: 1 cal = 4.18 J.

Front

What is the conversion of 250 calories to Joules?

Back

250 cal = 1,045 J.

Front

How many calories are in 1 kilocalorie?

Back

1 kcal = 1,000 cal.

Front

In which direction does heat flow when holding a hot cup of tea?

Back

Heat flows from the cup to the hand.

Front

What is the formula for converting calories to Joules?

Back

The formula is: Energy (J) = Energy (cal) × 4.18.

Front

Define energy conversion.

Back

Energy conversion is the process of changing energy from one form to another, such as converting chemical energy in food to thermal energy in the body.

Front

What is the unit of energy in the International System of Units (SI)?

Back

The unit of energy in the SI system is the Joule (J).

Front

What is the relationship between calories and Joules?

Back

1 calorie is equivalent to approximately 4.18 Joules.

Front

What is thermal energy?

Back

Thermal energy is the total kinetic energy of particles in a substance, which is related to its temperature.