If 42.0 kj of heat is added to a 32.0g sample of liquid methant under 1 atm of pressure at atemperature of -170c, what are the final state and temperatrue of the methane once the system equilibrates? assume no heat is lost to the surroundings. the normal boiling point of methane is -161.5c. the specific heats of liquid and gaseous methane are 3.48 and 2.22 j/g*k, respectively. heat of vaporization is 8.20 kj/mol.

In a laboratory experiment, a fermenting aqueous solution of glucose and yeast produces carbon dioxide gas and ethanol. the solution was heated by burning natural gas in a bunsen burner to distill the ethanol that formed in the flask. during the distillation, the ethanol evaporated and then condensed in the receiving flask. the flame of the burner was kept too close to the bottom of the flask and some of the glucose decomposed into a black carbon deposit on the inside of the flask. during this experiment the following changes occurred. which of these changes involved a physical change and not a chemical change? check all that apply. 1-condensation of ethanol 2-evaporation of ethanol 3- formation of carbon dioxide gas from glucose burning of natural gas 4-formation of ethanol from glucose by yeast 5-formation of a carbon deposit inside the flask

Explanation for basic character?

The chemical equation below shows the reaction of sodium (na) and chlorine (cl) to form sodium chloride (nacl). 2na + cl2 → 2nacl in this equation, which of the following is a reactant? i. sodium ii. chlorine iii. sodium chloride