Homework Answers
the mode of heat transfer is CONVECTION.
because in the convection heat transfer equation is according to newtons law is
Q = h x A x (Tb - Tf)
where h is heat transfer coefficient , Tb= solid temperature and Tf = liquid or gas temperature.
so that we say that mode of heat transfer is CONVECTION.
Add Answer to:
The mode of energy transfer between a solid at a temperature Tand an adjacent gas or...
heat transfer: phase and temperature The following information is given for magnesium at 1 atm: AHvap...
heat transfer: phase and temperature
The following information is given for magnesium at 1 atm: AHvap (1090.00°C) = 5.424 x 109 J/g AH fus (649.00°C) = 368.3 J/g To = 1090.00°C Tm = 649.00°C Specific heat solid = 1.017 J/g °C Specific heat liquid = 1.339 J/g °C A 35.30 g sample of liquid magnesium at 703.00°C is poured into a mold and allowed to cool to 23.00°C. How many kJ of energy are released in this process? (Report the...
Suppose you transfer a certain amount of heat energy to a known amount of a liquid...
Suppose you transfer a certain amount of heat energy to a known amount of a liquid in a perfectly insulated cup and the temperature changes. Then, you decide to alter the experiment in several different ways. Match the alterations listed below with the best description of the total change in temperature compared to that measured in the original experiment (before the alteration): - A Transfer more heat energy A. The total change in temperature will be smaller. - A Heat...
34. The phase changes B C and D - E are not associated with temperature increases...
34. The phase changes B C and D - E are not associated with temperature increases because the heat energy (q) is consumed to A) increase distances between molecules B) break intramolecular bonds C) rearrange atoms within molecules D) increase the density of the sample gas F མ། E liquid and gas 6.) T("C) solid and liquid liquid Tc B solid A Heat added (5)
Thermal energy storage systems commonly involve a packed bed of solid spheres through which a hot...
Thermal energy storage systems commonly involve a packed bed of solid spheres through which a hot gas flows when the system is being charged. In the charging process heat is transferred from the hot gas to the spheres and it increases the thermal energy stored in the spheres. Here are some variables that are important - the convection coefficient between the particle surface and the gas is h (W/m2 K) and the particle thermophysical properties are k (W/m K), Cp...
Phase changes are transitions between solid, liquid, and gas phases. For example, ice melting is an...
Phase changes are transitions between solid, liquid, and gas phases. For example, ice melting is an example of a phase change from a solid (ice) to a liquid (water). Phase changes involve changes in energy. Which of the statements regarding phase changes are true? Sublimation is the conversion of a gas to a solid. Freezing is the conversion of a gas to a liquid. Deposition is the conversion of a gas to a solid. Melting is the conversion of a...
Make a sketch of the Gibbs free energy, G, versus temperature, T, for a single component...
Make a sketch of the Gibbs free energy, G, versus temperature, T, for a single component system as the temperature increases at a fixed pressure, P. Indicate the temperatures where the pure substance changes from liquid to solid, and from solid to gas, and comment on the slopes of the plot of G versus T.
HOw much energy is required to heat 36.0g H2O from a liquid at 65C to a gas at 115C
HOw much energy is required to heat 36.0g H2O from a liquid at 65C to a gas at 115C? The following physical data may be uselful.Hvap=40.7kJ/molC liquid=4.18C gas=2.01C solid= 2.09T melting=0 CT boiling=100 CThe answers about 87.7 kJ However I'm not sure how you get this,so H=H heating liquid+H vap+H heating gas. I'm not getting the same answer
Heat of fusion (ΔHfus) is used for calculations involving a phase change between solid and liquid,...
Heat of fusion (ΔHfus) is used for calculations involving a phase change between solid and liquid, with no temperature change. For H2O, ΔHfus=6.02 kJ/mol. Specific heat capacity (C) is used for calculations that involve a temperature change, but no phase change. For liquid water, C=4.184 J/(g⋅∘C). Heat of vaporization (ΔHvap) is used for calculations involving a phase change between liquid and gas, with no temperature change. For H2O, ΔHvap=40.7 kJ/mol. How much heat is required to boil 77.5 g of...
// Chemical potential/phases A substance has three phases: gas, liquid, and solid. The chemical potentials of various phases are illustrated below. T (K) 1) For a given temperature, which of the sta...
//
Chemical potential/phases A substance has three phases: gas, liquid, and solid. The chemical potentials of various phases are illustrated below. T (K) 1) For a given temperature, which of the states represents an equilibrium condition? Submit 2) If the substance starts out in state Q and is held at constant temperature, what happens if it is allowed to reach equilibrium? The substance will freeze. The substance will evaporate The substance will melt and evaporate. The substance will sublime. Nothing...
Chapter 19, Problem 047 The temperature of 1.67 mol of an ideal monatomic gas is raised...
Chapter 19, Problem 047 The temperature of 1.67 mol of an ideal monatomic gas is raised 11.2 K at constant volume.What are (a) the work W done by the gas, (b) the energy transferred as heat Q, (c) the change AEn in the internal energy of the gas, and (d) the change AK in the average kinetic energy per atom? (a) Number (b) Number (c) Number (d) Number Click if you would like to Show Work for this question: Open...
heat transfer: phase and temperature
The following information is given for magnesium at 1 atm: AHvap (1090.00°C) = 5.424 x 109 J/g AH fus (649.00°C) = 368.3 J/g To = 1090.00°C Tm = 649.00°C Specific heat solid = 1.017 J/g °C Specific heat liquid = 1.339 J/g °C A 35.30 g sample of liquid magnesium at 703.00°C is poured into a mold and allowed to cool to 23.00°C. How many kJ of energy are released in this process? (Report the...
Suppose you transfer a certain amount of heat energy to a known amount of a liquid in a perfectly insulated cup and the temperature changes. Then, you decide to alter the experiment in several different ways. Match the alterations listed below with the best description of the total change in temperature compared to that measured in the original experiment (before the alteration): - A Transfer more heat energy A. The total change in temperature will be smaller. - A Heat...
34. The phase changes B C and D - E are not associated with temperature increases because the heat energy (q) is consumed to A) increase distances between molecules B) break intramolecular bonds C) rearrange atoms within molecules D) increase the density of the sample gas F མ། E liquid and gas 6.) T("C) solid and liquid liquid Tc B solid A Heat added (5)
Thermal energy storage systems commonly involve a packed bed of solid spheres through which a hot gas flows when the system is being charged. In the charging process heat is transferred from the hot gas to the spheres and it increases the thermal energy stored in the spheres. Here are some variables that are important - the convection coefficient between the particle surface and the gas is h (W/m2 K) and the particle thermophysical properties are k (W/m K), Cp...
Phase changes are transitions between solid, liquid, and gas phases. For example, ice melting is an example of a phase change from a solid (ice) to a liquid (water). Phase changes involve changes in energy. Which of the statements regarding phase changes are true? Sublimation is the conversion of a gas to a solid. Freezing is the conversion of a gas to a liquid. Deposition is the conversion of a gas to a solid. Melting is the conversion of a...
//
Chemical potential/phases A substance has three phases: gas, liquid, and solid. The chemical potentials of various phases are illustrated below. T (K) 1) For a given temperature, which of the states represents an equilibrium condition? Submit 2) If the substance starts out in state Q and is held at constant temperature, what happens if it is allowed to reach equilibrium? The substance will freeze. The substance will evaporate The substance will melt and evaporate. The substance will sublime. Nothing...
Chapter 19, Problem 047 The temperature of 1.67 mol of an ideal monatomic gas is raised 11.2 K at constant volume.What are (a) the work W done by the gas, (b) the energy transferred as heat Q, (c) the change AEn in the internal energy of the gas, and (d) the change AK in the average kinetic energy per atom? (a) Number (b) Number (c) Number (d) Number Click if you would like to Show Work for this question: Open...
Most questions answered within 3 hours.
-
Using MARS simulator, write MIPS programs according to
the following scenarios: Receive a positive integer number...
asked 12 minutes ago -
An object in front of a concave mirror has a real image that is
11.5 cm...
asked 26 minutes ago -
Consider the reaction, C3 H8 + O2 --> CO2 + H2O. How many
moles of O2...
asked 2 hours ago -
You and your opponent both roll a fair die. If you both roll the
same number,...
asked 2 hours ago -
In a study of the accuracy of fast food drive-through orders,
Restaurant A had 257 accurate...
asked 2 hours ago -
Identify and describe in detail the four categories of
institutions that could be included in a...
asked 2 hours ago -
In python
class Customer:
def __init__(self, customer_id, last_name, first_name, phone_number, address):
self._customer_id = int(customer_id)
self._last_name =...
asked 2 hours ago -
What is an example of a limitation in implementing a new
ERP system and how it...
asked 2 hours ago -
In a section of 9.7cm of an artery with a radius of 2.6mm there
is a...
asked 2 hours ago -
the two carboxylic acid groups of aspartic acid have different
acidities with pKa values of 2.1...
asked 2 hours ago -
Would CuCO3 aqueous salt combined with calcium chloride
form a solid precipitate? If so, what would...
asked 2 hours ago -
How do ECM Solutions assist in embedding a culture of continuous
improvement in an organization? (Project...
asked 2 hours ago