Explain how many photons are required to heat

Assignment Help Chemistry
Reference no: EM13206530

Suppose that the microwave radiation has a wavelength of 12.4cm . How many photons are required to heat 275mL of coffee from 25.0 ?C to 62.0 ?C? Assume that the coffee has the same density, 0.997g/mL , and specific heat capacity, 4.184J/(g?K) , as water over this temperature range.

Reference no: EM13206530

Questions Cloud

Theoretical perspective tends to use each level of analysis : Sociologists use two levels of analysis. List them and discuss each one’s focus. Which theoretical perspective tends to use each level of analysis?
What is the slope or rate of change : represents an estimate of the average cost of gas for year x starting in 1997 ("Consumer price index," 2006). The year 1997 would be represented by x = 1, for example, because it is the first year in the study. Similarly, 2005 would be year 9, or ..
Analyze possible employment effects of second alternative : The Occupational Safety and Health Administration (OSHA) promulgates safety and health standards. These standards typically apply to machinery (capital), which is required to be equipped with guards, shields, and the like.
How many hamburgers were sold on saturday : A local hamburger shop sold a combined total of 716 hamburgers and cheeseburgers on Saturday. There were 66 more cheeseburgers sold than hamburgers. How many hamburgers were sold on Saturday?
Explain how many photons are required to heat : Suppose that the microwave radiation has a wavelength of 12.4cm . How many photons are required to heat 275mL of coffee from 25.0 ?C to 62.0 ?C?
How much will accumulate in the investment : If Barry purchases a 2,000 Roth IRA when he is 25 years old and expects to earn an average of 6% per year compounded annually over 35 years( until he is 60), how much will accumulate in the investment?
Marsha warren : On the CD-ROM, read case study 4.1 titled, “Marsha Warren.” In 3 – 4 double-spaced pages, briefly summarize the scenario, and address the following analysis questions:
Compute the volume of o2 the bottle : Starting with 33 moles of O2 in a bottle, calculate the volume of O2 the bottle could deliver to a climber at an altitude where the temperature is -38 degrees Celsius and the atmospheric pressure is 0.37 atm
Delivery of human services : Select a current or proposed law that impacts the delivery of human services.

Reviews

Write a Review

Chemistry Questions & Answers

  What is the molar concentration of the excess reactant

What is the molar concentration of the excess reactant once this reaction has finished? (40%)

  State the ph at one half of the equivalence point

Volume of added base required to reach the equivalence point? State the pH at one half of the equivalence point

  What is the partial pressure of o2 in an oxygen

Patients suffering from respiratory disorders are often treated in oxygen tents in which the atmosphere is enriched in oxygen. What is the partial pressure of O2 in an oxygen tent consisting of 45% O2 for an atmospheric pressure of 753 mm Hg?

  Explain what is the oxidation state of copper

The minerals chalcocite (Cu2S) and malachite (Cu2CO3(OH)2) are two primary sources of copper. What is the oxidation state of copper in each of these minerals?

  How many grams of water should theoretically be produced

If 18.08 grams of ammonia (NH3) react, how many grams of water should theoretically be produced?

  State equilibrium the pressure of nh3

At equilibrium the pressure of NH3 (g) is 1.23 atm. NH4Cl (s) ---> NH3 (g) + HCl (g) Find the equilibrium constant Ka for the reaction

  State concentration of nadh was found by using beer''s law

Concentration of NADH was found by using beer's law using 6.22 mM cm-1 as extinction coefficient. Concentration of NADH = .0212 mM. Moles of NADH that are present in 1.02 mL sample was found by : .0212 mM x 1.02 mL = .021624 mM/mL

  What volume of .250 m naoh is required

What volume of .250 M NaOH is required to neutralize a 10mL sample of .750 M HCl.

  Express the final pressure in torr

A gas has a pressure of 4.82035 atm when its volume is 2.75 L. What will the pressure be when the volume is changed to 1.91015 L, assuming constant temperature.

  What is the molarity of acetic acid in the sample

A 15.0-­-mL unknown sample of aqueous acetic acid, CH3COOH(aq), was titrated using 0.800 M NaOH. If the titration endpoint was found to be 20.0 mL.

  Determine the final temperature after thermal equilibrium

A sample of water 53 g with a temperature of thirty six degree celsius is combined to 250 grams of H 2 O at 91 degree Celsius  in an insulated container. Determine the final temperature after thermal equilibrium is reached?

  Compute k for ethylamine reaction

When ethylamine, a weak base (Kb=4.3E-4), reacts with the formic acid, a weak acid (Ka=1.8E-4), the following reaction takes place: Calculate K for this reaction.

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd