Question

when components of a cold pack are mixed with water sketch link vs 1/T of reaction

when components of a cold pack are mixed with water sketch link vs 1/T of reaction

Homework Answers

Answer #2

If this is a cold pack, as the name implies, will turn "cold" when required.

This implies that the reaction is ENDOTHERMIC, meaning it must absorbs energy form the surroundings

in this case your skin. so it decreases the temperature

answered by: anonymous
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A) A plot of link vs 1/T for a reaction gives a slope of 4160 and...
A) A plot of link vs 1/T for a reaction gives a slope of 4160 and intercept of 1.75. Find the ΔH° for this reaction. B) The first order decay of radon has a half-life of 3.823 days. How many grams of radon remain after 7.22 days if the sample initially weighs 250.0 g? C) Determine the ΔHsolute for KBr if the ΔHsolution (KBr)= +19.9 kj/mol and the ΔHhydration(KBr) = -670kj/mol
A coffee-cup calorimeter can be used to study the "cold pack reaction," the process that occurs...
A coffee-cup calorimeter can be used to study the "cold pack reaction," the process that occurs when solid ammonium nitrate dissolves in water. (dC= degrees celcius) NH4NO3(s) -----> NH4+(aq) + NO3-(aq) suppose 25.0 grams of solid ammonium nitrate at 23.0 dC is added to 250. mL of water at the same temperature. After all the solid is dissolved, the temperature is measured to be 15.6dC. Calculate the energy change, in kJ/mole, for this reaction, and state whether the reaction is...
An instant cold pack consists of two bags, one containing water inside a bag containing ammonium...
An instant cold pack consists of two bags, one containing water inside a bag containing ammonium nitrate. When the inner bag of water is broken by squeezing the package, ammonium nitrate dissolves and the solution becomes colder. Predict the sign for each of the following and provide a brief justification. a.) ΔH b.) ΔS c.) ΔG
Instant hot packs contain a solid and a pouch of water. When the pack is squeezed,...
Instant hot packs contain a solid and a pouch of water. When the pack is squeezed, the pouch breaks and the solid dissolves, increasing the temperature because of the exothermic reaction. The following reaction is used to make a hot pack: LiCl(s)⟶Li+(aq)+Cl−(aq)ΔH=−36.9kJ What is the final temperature in a squeezed hot pack that contains 23.9 g of LiCl dissolved in 139 mL of water? Assume a specific heat of 4.18 J/(g⋅∘C)for the solution, an initial temperature of 25.0 ∘C, and...
The salt potassium bromide dissolves in water according to the reaction: KBr(s) K+(aq) + Br-(aq) (a)...
The salt potassium bromide dissolves in water according to the reaction: KBr(s) K+(aq) + Br-(aq) (a) Calculate the standard enthalpy change ΔH° for this reaction, using the following data: KBr(s) = -393.8 kJ mol-1 K+(aq) = -252.4 kJ mol-1 Br-(aq) = -121.6 kJ mol-1 ________kJ (b) Suppose 63.5 g of KBr is dissolved in 0.186 L of water at 24.3 °C. Calculate the temperature reached by the solution, assuming it to be an ideal solution with a heat capacity close...
When components A and B are mixed, this system has a maximum temperature azerotrope at 1-bar...
When components A and B are mixed, this system has a maximum temperature azerotrope at 1-bar pressure. Suppose 2 moles of pure A is in vapor-liquid equilibrium and 0.1 moles of liquid B is added at constant pressure. What happens? Explain why.
An Arrhenius plot (ln k vs. 1/T) for a second order reaction (2A -> C) produced...
An Arrhenius plot (ln k vs. 1/T) for a second order reaction (2A -> C) produced a straight line with a slope of -8.23e+03 K. What is the value of the Arrhenius pre-exponential if k = 4500 M-1 s-1 at 690 K?
Explain why phospholipids spontaneously form a bilayer when mixed with water? 1. Because the polar tails...
Explain why phospholipids spontaneously form a bilayer when mixed with water? 1. Because the polar tails come together in the inside of the membrane; 2. because the polar head groups come together; 3. because they have one end that is polar and another that is non-polar
When 230 mg of AgNO3 and 0.02 g of Kl are mixed together in 1 L...
When 230 mg of AgNO3 and 0.02 g of Kl are mixed together in 1 L of water, how much Agl will form?
Predict the products for the reaction of 2-phenylethanal with: 1.) Tollen's Reagent 2.) CrO3/H2SO4 3.) Cold...
Predict the products for the reaction of 2-phenylethanal with: 1.) Tollen's Reagent 2.) CrO3/H2SO4 3.) Cold Dilute potassium/H+/Heat 4.) Lithium aluminum hydride 5.) Sodium borohydride 6.) Phenylmagnesium bromide then water 7.) Cyanide in the presence of acid 8.) Hydoxylamine 9.) Phenylhydrazine 10.) 2,4-nitrophenylhydrazine 11.) Ethanol and dry HCl 12.) Semicarbazide
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT