Choose the BEST answer to the following:' The amount of heat transferred to a system can be measured in (a) calories. (c) Either. (b) joules. (d) Neither.

Q: What are the benefits of the high specific heat of water?

A: Specific heat is defined as the amount of heat needed to increase the temperature of unit mass of a…

Q: What condition is necessary for flow of heat?

A: The factor or condition that is necessary for heat transfer to occur is that two object 'must have…

Q: How an ice box or refrigerator keep things cold for a long time?

A: Refrigerator works based on the principle heat is taken from the source at a higher temperature and…

Q: Cite three ways in which a Thermos bottle inhibits heat transfer.

A: Construction of thermos is as shown in the figure. Coffee is stored in an internal container as…

Q: Which has more kinetic energy- a molecule in a gram of ice water or a molecule in a gram of…

A: A molecule in a gram of steam will tend to have more kinetic energy than the molecule in a gram of…

Q: Dominoes are placed upright in a row, one next to another. When one is tipped over, it knocks…

A: If we visualize the dominoes as the molecules of a solid material , then it will closely resembles…

Q: Steam expands behind a piston doing 67,800 joules of work. If 12.7 kJ of heat is radiated to the…

A: Given ∆Q=-12.7kJ∆W=-67.8kJ

Q: Is it possible for heat to flow between two objects with the same internal energy? Can heat flow…

A: yes it is possible for heat to flow between two objects with the same internal energy.

Q: Consider two glasses, one filled with water and the other half-full, both at the same temperature.…

A: There are two glasses, one of which is completely filled, and the other is half filled, both at the…

Q: When can you add heat to something without raising its temperature?

A: When water is heated, the temperature rises till 100oC and then it boils. After this point, the…

Q: If you hear that an object has “high heat content,” does thatmean that its temperature is high?…

A: To determine: What does it mean, if the object has high heat content, explain whether the…

Q: How does specific heat relate to how fast a substance changes temperature?

A: The heat loss, ∆H, from a substance of mass m and specific heat s, is related to the change in…

Q: Why does most of the energy expended by a swimmer ultimately converts into heat energy when she…

A: Why does most of the energy expended by a swimmer ultimately converts into heat energy when she…

Q: Consider two glasses, one filled with water and the other half-full, with the water in the two…

A: The average speed of the molecules depends upon the temperature at which the substance is. Since…

Q: Cite three examples in which Thermos bottle inhibits heat transfer?

A: The Thermos bottles use thermal isolation to prevent the transfer of the thermal energy or heat.

Q: How does the latent heat of fusion of water help slow the decrease of air temperatures, perhaps…

A: The latent heat of water below zero degree Celsius (ice) is 334 J/g. the amount of latent heat of…

Q: How does the law of the conservation of energy relate to the first law of thermodynamics?

A:

Q: What does that specific heat of a substance relate to its ability to change temperature?

A: As we know, the relationship between specific heat and temperature of a substance is given by the…

Q: How does the second law of thermodynamics relate to the direction of heat flow?

A: Let us understand this with an example. A hot cup of coffee is kept in open atmosphere.

Q: A block of wood and steel is placed in a thermally stable room, which one has a lower temperature?,…

A: Wooden and steel block both are placed in a thermal stable room.

Q: A process in which no energy is transferred by heat between a system and its surrounding, is called?

A:

Q: What does it mean to say that two systems are in thermal equilibrium?

A: What does it mean to say that two systems are in thermal equilibrium?

Q: why a metal spoon left in a pot of boiling water gets hot so fast ?

A: In metals heat transfer takes place by conduction . In conduction heat transfer takes place by…

Q: Boiling water, uncovered, on a stove is an example of what method of heat transfer?

A:

Q: The same amount of heat flows into two non-identical bowls of soup, which are initially at the same…

A:

Q: Which is largest unit of heat transfer- Calorie, calorie, joule?

A:

Q: The box “Thermodynamics Dramatized” shows the crushing of an inverted steam-filled can placed in a…

A: The water in the pan need not be cold. The water in the pan should be cooler than the water in the…

Q: What is meant by dynamical theory of heat?

A: According to dynamic theory of heat everybody is made of small particles called molecules.This…

Q: Name the method of heat transfer which doesnot depend on gravity.

A: In radiation, heat is transferred without any motion of the medium particles

Q: Name two factors on which the heat energy liberated by a body on cooling depends.

A: The heat energy liberated by the body depends on the specific heat capacity of the body, the mass of…

Q: Why does the balloon in a smaller container filled with hot water sink after it has been put in a…

A: Given: Why does the balloon in a smaller container filled with hot water sink after it has been put…

Q: What is thermodynamic identity ?

A: To determine: What is meant by thermodynamic identity?

Q: Why does a piece of watermelon stay cool for a longer time than sandwiches do when both are removed…

A: Given:  watermelon and sandwiches

Q: Show that heat always flows from high temperature to low temperature.

A: Heat always flows from high temperature to low temperature because of Second law of thermodynamics

Q: What is meant by thermodynamics?

A:

Q: The heat never flows spontaneously from a colder object to a hotter object. why?

A: Heat flows

Q: Make a contrast between a boot that is chilly and a boot that is warm.

A: We have to find the difference between a chill boot and a warm boot.

Q: How are you quickly able to bring a pan of water to a boil when water is poor conductor of heat?

A: The conductivity of water is less than that of most metals but greater than that of air. Even though…

Q: The process of heat radiation is the ONLY method of heat transfer that can occur under water.…

A: The process of heat radiation is the ONLY method of heat transfer that can occur through space.

Q: Does a good insulator prevent heat from escaping , or does it simply slow its passage?

A:

Q: Rank the magnitudes of these units of thermal energy from greatest to least: a. 1 calorie b. 1…

A: Calorie is the amount of heat required to raise temperature from 14.5 0 C to 15.50 C of 1 gram…

Q: Which one of the following processes of heat transfer requires the presence o fluid?

A: Processes of heat transfer requires the presence fluid

Q: When you blow up a balloon, do you slightly warm the balloon? When air is allowed to rush out of it,…

A: Let us assume the gas to be ideal and the ideal gas equation reads, All the symbols have their…

Q: Which law of thermodynamics tackles the role of insulators and conductors in heat flow: zeroth,…

A:

Q: Distinguish between a calorie and a joule?

A: Both calorie and joule are the units of energy. The main difference in both the units is that a…

First law of Thermodynamics

The word thermodynamics consists of two words: thermo- and dynamics. Dynamics means the study of motion. The field of thermodynamics is all about the study of the movement of heat. In a more meaningful way, it is stated as the study of the transfer of energy. Energy transfer is something that we encounter in day-to-day life. Automobiles, chemical reactions, refrigerators, and power generators work on the basis of thermodynamic principles.