Across
- 2. a substance that is present at the start of a chemical reaction.
- 3. a reaction in which energy is released in the form of light or heat
- 5. unit of work or energy in the International System of Units
- 7. the result of the movement of tiny particles called atoms, molecules or ions in solids, liquids and gasses.
- 8. the Standard International ( SI ) unit of thermodynamic temperature.
- 9. The amount of energy necessary to change a liquid to a vapor at constant temperature and pressure.
- 10. the process by which heat or electricity is directly transmitted through a substance when there is a difference of temperature or of electrical potential between adjoining regions, without movement of the material.
- 13. the energy contained within a system that is responsible for its temperature
- 15. the branch of chemistry concerned with the quantities of heat evolved or absorbed during chemical reactions.
- 16. a substance that is present at the end of a chemical reaction.
- 18. the heat required to raise the temperature of the unit mass of a given substance by a given amount (usually one degree).
- 19. (of a reaction or process) accompanied by or requiring the absorption of heat.
Down
- 1. the science of determining the change in energy of a system by measuring the heat exchange of the system with the surroundings.
- 4. the amount of energy needed to warm 1 g of H2O by 1°C
- 6. energy that comes from a source and travels through space at the speed of light.
- 11. the movement caused within a fluid by the tendency of hotter and therefore less dense material to rise, and colder, denser material to sink under the influence of gravity, which consequently results in transfer of heat.
- 12. scale based on 0° for the freezing point of water and 100° for the boiling point of water.
- 14. Solids can be heated to the point where the molecules holding their bonds together break apart and form a liquid.
- 17. the energy that comes from motion