3. Gary is working on a physics problem in which 100.0 g of water undergoes a phase transition from water to vapour. He comes up with the following answer for the amount of energy in the transition: (0.100 kg)(2.3 x 10° )(100.0°C) = 2.3x 10 J Is Gary's answer correct? If so, explain. If not, what mistake did Gary make?

3. Gary is working on a physics problem in which 100.0 g of water undergoes a phase transition from water to vapour. He comes up with the following answer for the amount of energy in the transition: (0.100 kg)(2.3 x 10° )(100.0°C) = 2.3x 10 J Is Gary's answer correct? If so, explain. If not, what mistake did Gary make?

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter31: Radioactivity And Nuclear Physics

Section: Chapter Questions

Problem 3PE: (a) Repeat Exercise 31.2, and convert the energy to joules or calories. (b) If all of this energy is...

See similar textbooks

Similar questions

We have a quantum mechanical system that has two states, one at energy 2ev and another at energy 3ev . We put this system in an equal superposition of these two states. Enter the frequency in Hz (cycles per second) of the resulting oscillation of this system. (Please give your answer to three significant figures. If you were entering a number 1.23 times 10 to the power 45, you could type 1.23e45.)
My physics class has turned to online due to the COVID-19 and I am having trouble with some of the word problems my teacher gave me to work on. She presented me with: I am contemplating a career change. If I had 500g of stolen gold jewelry, how much energy would I have to add to it to melt it (so that it was not longer recognizable)? Pretend that it is pure gold. Would you be able to show me how to accomplish this problem so I can see the steps? Thank you for your time. John Payton
1.) How many particles are present in a closed container if the energy it contains is 95204.74 J, and the diatomic oxygen gas is moving at a velocity of 21.45 m/s? Use only the whole number for the value of atomic mass unit. Express your answer in proper scientific notation. 2.) A car generating a power of 97010.23 watts is traveling on a road with a coefficient of kinetic friction of 0.05. If the velocity of it upon reaching its destination is 29.16 m/s and has been accelerationg at a rate of 3.45m/s^2, what is the mass of the car?
(II) At a crime scene, the forensic investigator notes that the6.2-g lead bullet that was stopped in a doorframe apparentlymelted completely on impact. Assuming the bullet was shotat room temperature (20°C), what does the investigatorcalculate as the minimum muzzle velocity of the gun?
A 0.20-kg billiard ball bounces back and forth without losing its energy between the cushions of a 1.5 m long table. (a) If the ball is in its ground state, how many years does it need to get from one cushion to the other? You may compare this time interval to the age of the universe. (b) How much energy is required to make the ball go from its ground state to its first excited state? Compare it with the kinetic energy of the ball moving at 2.0 m/s.
(a) Repeat Exercise 31.2, and convert the energy to joules or calories. (b) If all of this energy is converted to thermal energy in the gas, what is its temperature increase, assuming 50.0 cm3 of ideal gas at 0.250atm pressure? (The small answer is consistent with the fact that the energy is large on a quantum mechanical scale but small on a macroscopic scale.)
There is approximately of energy available from fusion of hydrogen in the world's oceans. (a) If of this energy were utilized, what would be the decrease in mass of the oceans? (b) How great a volume of water does this correspond to? (c) Comment on whether this is a significant fraction of the total mass of the oceans.
Integrated Concepts If you want to cook in water at 150C, you need a pressure cooker that can withstand the necessary pressure. (a) What pressure is required for the boiling point of water to be this high? (b) If the lid of the pressure cooker is a disk 25.0 cm in diameter, what force must it be able to withstand at this pressure?
As part of a biology field trip, you have taken an equal-arm balance (Fig. P1. 14) to the beach. Your plan was to measure the masses of various mollusks, but you forgot to bring along your set of Standard gram masses. You notice that the beach is full of pebbles. Although there are variations in color, texture, and shape, you wonder whether you can somehow use the pebbles as a Standard mass set. Develop a procedure for assembling a Standard mass set from the pebbles on the beach. Describe your procedure step by step so that someone else could follow it.
In the text, it was shown that N/V=2.681025m3 for gas at STP. (a) Show that this quantity is equivalent to N/V=2.681019cm3, as stated. (b) About how many atoms are mere in one m3 (a cubic micrometer) at STP? (c) What does your answer to part (b) imply about the separation of Mama and molecules?
(a) Calculate the speed of a particle of dust that has the same momentum as a proton moving at 0.999c. (b) What does the small speed tell us about the mass of a proton compared to even a tiny amount of macroscopic matter?
The Sun radiates like a perfect black body with an emissivity of exactly 1. (a) Calculate the surface temperature of the Sun, given that it is a sphere with a 7.00108m radius that radiates 3.801026W into 3-K space. (b) How much power does the Sun radiate per square meter of its surface? (c) How much power in watts per square meter is that value at the distance of Earth, 1.501011m away? (This number is called the solar constant.)