1: Derive the two Tds relations from the energy balance. a. The first Tds relation and the second Tds relation. b. Derive the entropy change between two states 1 and 2 for solids in terms of the specific heat. c. For an isentropic process, derive the relationship between temperatures of the two states for solid. d. What are the entropy changes from the Tds relations if ideal gases are considered

Can anyone (a-level) a student was analysing a carbonate compound, mco3, containing an unknown group 2 metal, m. the student carried out thermal decomposition on 0.730g of the carbonate and measured the volume of gas produced. mco3 (s) mo (s) + co2 (g) the student collected and measured 120cm3 of carbon dioxide. 1 mol of carbon dioxide occupies 24 000 cm3 under these conditions. calculate the molar mass of the group 2 carbonate and hence deduce the identity of the group 2 metal, m.

The chart shows the bid provided by four contractors to complete a job. which contractor is the most cost-effective?

What is the approximate vapor pressure when the gas condenses at 70 degrees celsius