1.00 kg of ice at -10 °c is heated using a bunsen burner flame until all the ice melts and the temperature reaches 95 °c. a) how much energy in kj is required to effect this transformation? b) if the enthalpy of combustion of chis, the gas used in a bunsen ourne laine is -890 kj/mol how many grams of ch4 is required to ruei ne transformation described in this proviein?

We can observe physical properties of elements and compounds without changing the substance.

Examples of physical properties: Density, color, boiling point, state of matter, appearance: dull or shiny, etc. 

But we can also observe and measure chemical properties by reacting a substance with something else. For example, like mixing baking soda and vinegar together. The vinegar reacts with the baking soda and produces carbon dioxide: a new substance. 

Some examples of chemical properties: Flammability, amount of heat that is released during combustion, toxicity (how much damage it causes to other organisms), radioactivity, and ability to oxidize (when you have metal that becomes rusty looking).