When 0.0901 mol of an unknown hydrocarbon is burned in a bomb calorimeter, the calorimeter increases in temperature by 2.19°C. If the heat capacity of the bomb calorimeter is 1.229 kJ/°C, what is the heat of combustion for the unknown hydrocarbon?

The heat of combustion for the unknown hydrocarbon is -29.9 kJ/mol

Explanation:

Step 1: Data given

Number of moles of the unknown hydrocarbon = 0.0901 moles

The temperature in the calorimeter rises with 2.19 °C

The heat capacity of the calorimeter is 1.229 kJ/°C

Step 2: Calculate heat

Q = c(calorimeter) * ΔT

⇒with Q = the heat transfer = TO BE DETERMINED

⇒with c = the heat capacity of the calorimeter = 1.229 kJ/°C

⇒with ΔT = The change in temperature = 2.19 °C

Q = 1.229 kJ/°C * 2.19 °C

Q = 2.6915 kJ

Step 3: Calculate the heat of combustion for the unknown hydrocarbon

Heat of combustion = Q/moles

Heat of combustion = 2.6915 kJ / 0.0901 moles

Heat of combustion = 29.9 kJ/mol ( the sign should be negative )

Heat of combustion = -29.9 kJ/mol

The heat of combustion for the unknown hydrocarbon is -29.9 kJ/mol

when—without warning—something provokes your anger, you may struggle not to succumb to it. since what typically makes you mad is feeling powerless in the face of what seems unfair, your anger is mostly an attempt at a “quick fix” to right the balance. it’s as though you’re raising a fist in protest, proclaiming that you’re not going to capitulate to such injustice.

there are, however, a multitude of problems related to this immediate, push-back reaction of anger. and probably the key one is that almost never does it resolve the issue that gave rise to it. such reactive anger is probably best understood as self-defeating. as david burns, the author of the seminal self- book feeling good, observes: if realistically, acting on your anger is to make any sense, it needs to meet two criteria—which, in almost every case, is frankly impossible. that is, your anger must:

be directed toward a person who has intentionally (and needlessly) behaved in a hurtful way toward you; and

be beneficial or advantageous to you (i.e., assist you in achieving a desired goal).

i think you’ll agree that only rarely can you claim that your anger is both warranted and , whether to yourself or the relationship.

so let me offer you a two-step alternative to abandoning your better judgment and giving in to the temptation of anger—one that should neutralize your anger in seconds. or, when you’re really angry, in minutes.

but keep in mind that you must really want to execute these steps, be sufficiently motivated to perform them. which means overcoming more unconscious resistance than you might ever have imagined. because there are many immediate “advantages” of anger that can interfere with your resolve, i’ll suggest a few of them that might interfere with your employing this powerful method to rid yourself of counter-productive anger.

explanation:

the old alchemists made significant contributions to science even though there starting premises were off a bit. their conclusions after failure would steer them into better directions for investigation. science is no more than close observation and the initial mistakes result in rethinking and retrying experiments.