1. Supposed you have a beaker of water that is being heated on a hot plate. If you are studying the amount of heat that is requred to change the water temperature by a certin amount. What is a reasonable choice for the system and surroundings?

2. For the enthalpy change to be the same as the heat at constant pressure, ?H=q p pressure must be constant (as indicated by the subscropt "p". How will you keep the pressure constant in this laboratory experiment?

3. The specific heat of aluminum (as used in a soda can) is C(al)= 0.900 J g^(-1) K^(-1). The specific heat of water is C(water) = 4.184 J g^(-1) K^(-1).

a.If samples of water and aluminum of equal mass are heated from 25 C to 75 C, which sample absorbs more heat? Briefly explain your answer using reasoning and not calculations.

b. If the same amount of energy is added to each sample, which feels hotter to the touch? Briefly explain your answer using reasoning and not calculations.

c.If a water sample weights 200.g, calculate the energy required to raise the temperatre from 25 C to 75 C

4.Write out a balanced chemical equation(including states) for the combustion of methanol.