Question 6

a teacher listed the following two processes.
• process 1: water changing to ice in a freezer
• process 2: steam coming out of a kettle filled with hot of water

which set of statements correctly identifies the change of energy taking
place in each example?

a. "process 1: energy is increasing process 2: energy is increasing"
b. "process 1: energy is decreasing process 2: energy is increasing"
c. "process 1: energy is decreasing process 2: energy is decreasing"
d. "process 1: energy is increasing process 2: energy is decreasing"

some sources quote the lethal dose, for an average 170lbs opiate-naive individual is between 75 and 375 mg

> b takes place in the gas phase in an isothermal tubular reactor. the feed is one mole of a per one mole of c, an inert. the entering temperature and pressure are 427°c and 10 atm, respectively. the gas constant r = 0.08206 atm · l/mol · k.

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.