Mrs. harrison mixes some chemicals together in a glass beaker in front of her science class. she asks her students to watch for a chemical reaction when she holds it over a bunsen burner. she sets the flame on "low" and holds the beaker a few inches above the heat. after about 30 seconds, the mixture begins to fizz. what could mrs. harrison do to make the chemical change occur faster? a) add twice as much of a chemical in the mixture b) increase the flame setting to produce more heat c) use a smaller beaker with the same amount of chemicals d) add cold water to the mixture to reduce its temperature

The answer is B. Just had this question.

plasma is the state of matter where the substance is ionized and has no definite shape or volume. the fact of being ionized makes the substance a good electrical conductor.

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.