Tear this page out of your laboratory manual and submit it to your TA with your

Question

Tear this page out of your laboratory manual and submit it to your TA with your answers. Classify the 4 reactions that your group analyzed today as being either exothermic or endothermic. If you dissolve 10.0 g of compound X in 100.0 mL of distilled water, the liquid turns red. The temperature of the liquid stays at 24 degree C for 10 minutes. Why would you not want to sell a cold pack made with compound X? Consider a beaker of water that has an initial temperature of 25 degree C. When an ionic salt is dissolved in the water, the temperature changes to 5 degree C. a. If you were to touch the beaker, what would you feel? b. Is this reaction endothermic or exothermic? c. Is the energy of the products higher or lower than the energy of the reactants? Two competing corporations are submitting data to the US Military to create chemical hot packs. The Military has stipulated that the each hotpack may cost no more than 85 cents and must result in at least a 20 degree C rise in temperature when activated. Which of the following companies is the Military going to hire?

Explanation / Answer

1.If the reaction release heat to the surrounding then it is exothermic and if a reaction absorb heat from surrounding it is said to be endo thermic ( if you feel hot in reaction vessel during the reaction then the reaction is exothermic , If you feel cold in reaction vessel during the reaction then the reaction is end thermic )

3. a) feeling cold

b) endo thermic

c)Energy of the products is lower than the reactants

4.company A : 5 raise by 1.5 g of Y

For 1kg 3333.33 raise

Price :$184.04/Kg

Cost per 1 raise is $0.055

Company B : 2.5 raise from 1 g

from 1kg 2500 raise

Price : $97.13 per Kg

cost per 1 raise is $0.039

Company B is economic comparing to company A , so the military going to hire company B.

Related Questions

Navigate

• Browse (All)
• Browse T
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.