Given the EÂ° values for two half reactions, you can easily predict the potential difference of the corresponding cell: simply add the reduction potential of the reduction half-cell to the negative of the reduction potential (that is, to the oxidation potential) of the oxidation reaction.
How to Melt Glass With a Torch. Glass melting has a long history, going back to approximately 3000 BC. In these early times, glass was melted to decorate vases. Glass is made up of silica, sodium carbonate and calcium carbonate. Most glass melts at 1400 to 1600 degrees Farenheit. Nevertheless, there are specialized glasses that will melt at as low as 900 degrees.
Tempered glass poses fewer risks than regular glass. When glass breaks, it often forms large, dangerous shards that can pose significant safety risks. By heating glass at a high temperature then rapidly cooling it, manufacturers create tempered safety glass, which crumbles into small pieces when broken. Residential building codes specify where this safety glass must be installed in the home in order to reduce the risk of injury or death.