A certain substance has a mass per mole of 41 g/mol. When 315 J is added as heat to a 33.0 g sample, the sample's temperature rises from 27.0°C to41.0°C. What are the (a) specific heat and (b) molar specific heat of this substance? (c) How many moles are present?(a) NumberUnits(b) NumberUnits(c) NumberUnits

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Answered: A certain substance has a mass per mole…

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter21: Heat And The First Law Of Thermodynamics

Section: Chapter Questions

Problem 68PQ

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A certain substance has a mass per mole of 50.0 g/mol.When 314 J is added as heat to a 30.0 g sample, the sample’s temperature rises from 25.0 C to 45.0 C. What are the (a) specific heat and (b) molar specific heat of this substance? (c) How many moles are in the sample?
If the heat is assumed to be generated 0.03 m below the skin, the temperature difference between the skin and the interior of the body would exist if the heat were conducted to the surface is 28 k°. What is the heat rate if the surface area of the body is 1.5m? and the coefficient of the thermal conductivity= 0.2watt/m.k°. 290 watt 310 watt 280 watt 260 watt
One mole of water vapor at 346 K cools to 280 K. The heat given off by the cooling water vapor is absorbed by 10 mol of an ideal gas, and this heat absorption causes the gas to expand at a constant temperature of 273 K. If the final volume of the ideal gas is 24 L, determine its initial volume. The specific heat of water is 4186 J/kg °C and the latent heat of vaporization is 2.26 x 106 J/kg. Answer in units of 1.
A series of composite wall of a furnace consists of 20cm of firebrick, 15cm of a high temperature insulating material, 12cm of ordinary brick, and lastly, 8mm of asbestos cement board. The inside of the furnace wall is 100C. Determine the heat transfer through the wall per m². Firebrick k=1.4W/m-K High temperature insulation k = 0.22 W/m-K Ordinary brick k = 0.90 W/m-K Asbestos k = 0.39 W/m-K
A closed box is filled with dry ice at a temperature of -86.0 °C, while the outside temperature is 21.0 °C. The box is cubical, measuring 0.394 m on a side, and the thickness of the walls is 4.49 × 102 m. In one day, 3.76 × 106 J of heat is conducted through the six walls. Find the thermal conductivity of the material from which the box is made. Number Units
Jill takes in 0.0140 mol of air in a single breath. The air is taken in at 20.0°C and exhaled at 35.0°C. Her respiration rate is (1.30x10^1) breaths per minute. At what average rate does heat leave her body due to the temperature increase of the air? Provide your answer to three significant figures. HINT: Use the molar specific heat at constant volume to find the heat loss, where Cv = 5R/2 (for an ideal diatomic gas).
A 0.150-kg sample of a metal alloy is heated at 540 Celsius an then plunged into a 0.400-kg of water at 10.0 Celsius, which is contained in a 0.200-kg aluminum calorimeter cup. The final temperature of the system is 30.5 Celsius. What is the specific heat of the metal alloy in J/Kg.Celsius? O 497 O 74.60 50.00 O 3316 994
In an experiment to determine the specific heat of copper, a piece of copper weighing 50.06 is first heated to 100°C in steam. It is then immersed into water at 27.06°C.The water in the calorimeter weighs 100.08 g and the inner aluminum cap weighs 50.07 g. If the final temperature is 30.01°C, what is the specific heat of copper in CGS units given that the specific heat of aluminum is 0.22 cal/g- C? (Put only the value in three significant figures without the unit.) hanges to this answer Question 14 of 20
A closed box is filled with dry ice at a temperature of -80.9 oC, while the outside temperature is 28.4 oC. The box is cubical, measuring 0.379 m on a side, and the thickness of the walls is 4.41 × 10-2 m. In one day, 3.66 × 106 J of heat is conducted through the six walls. Find the thermal conductivity of the material from which the box is made.
Presents the diagram of the problem, necessary formulas, clearance and numerical solution: A thermos contains 150 g of water at 4 ◦C. Inside it are placed 90 g of metal at 100 ◦C. After equilibrium is established, the temperature of the water and metal is 21 ◦C. What is the specific heat of the metal? Assume that there are no heat losses from the thermos.
While swimming, conduction can play a big role in heat loss from the body. The body of one swimmer has a total surface area of 1.80 m2 and an average thickness of 1.60 mm. The skin's thermal conductivity is 0.370 W/m-K. If the water's temperature is 20.0°C, and the blood reaching the inner surface of the skin is at 37.0°C, what is the rate of energy loss for that person through conduction?
In an experiment to determine the thermal conductivity of a bar of a new alloy, one end of the bar is maintained at 0.200 °C and the other end at 101 °C. The bar has a radius of 9.00 cm and a length of 43.3 cm. If the rate of heat transfer through the bar is 34.0 W, what is the thermal conductivity of the bar? amazor W/m* C K =

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