Question
When two systems 1 and 2 are in thermal equilibrium, _______
- Heat flows from 1 to 2
- Heat flows from 2 to 1
- Heat does not flow at all
- Heat first flows from 1 to 2 then from 2 to 1
Hint:
The heat will not flow since it's in thermal equilibrium.
The correct answer is: Heat does not flow at all
Two physical systems are in thermal equilibrium if there is no net flow of thermal energy between them when they are connected by a path permeable to heat. Thermal equilibrium obeys the zeroth law of thermodynamics. Hence heat will not flow.
Related Questions to study
When the heat is removed from a system, its internal energy _____.
When the heat is removed from a system, its internal energy _____.
________ is an invisible transfer of energy into or out of a system.
________ is an invisible transfer of energy into or out of a system.
Heat is added or removed from a system by _____.
Heat is added or removed from a system by _____.
When the system is touched to a hot reservoir its internal energy _____.
When the system is touched to a hot reservoir its internal energy _____.
When the work is done on the system its internal energy _____.
When the work is done on the system its internal energy _____.
Two systems in contact are in thermal equilibrium. This means that ____.
Two systems in contact are in thermal equilibrium. This means that ____.
Work is done on or by the particles of a gas system by _____.
Work is done on or by the particles of a gas system by _____.
_____ is a visible transfer of energy into or out of a system.
_____ is a visible transfer of energy into or out of a system.
The volume of the system does not change. Such a system is called ____.
The volume of the system does not change. Such a system is called ____.
The temperature of the system does not change. Such a system is called ________.
The temperature of the system does not change. Such a system is called ________.
A pot of water is heated, what happens at a molecular level?
A pot of water is heated, what happens at a molecular level?
743 J = ____ cal
743 J = ____ cal
847 cal = ___ kcal
847 cal = ___ kcal
625 cal = ____ J
Energy is the ability to do work which is measured in different units. Calorie and Joule are the units of energy which are proportionate to each other. This implies any change in the value of calories will change its equivalent value in joules. The relation between calorie and joule can be numerically written as : 1 calorie = 4.2 joules approx.
Hence, 625 cal= (625* 4.2)= 2,615 joules.
625 cal = ____ J
Energy is the ability to do work which is measured in different units. Calorie and Joule are the units of energy which are proportionate to each other. This implies any change in the value of calories will change its equivalent value in joules. The relation between calorie and joule can be numerically written as : 1 calorie = 4.2 joules approx.
Hence, 625 cal= (625* 4.2)= 2,615 joules.
25 kcal = ____cal
The kilo calorie is a measurement unit of energy. The symbol of kilo calorie is kcal.The kilocalorie is used in measuring the heating, calorific value or metabolizing foods. It equals to 1000 calories, or approximately 4.2 kilojoules. Therefore, 1 kcal= 1000 cal.
so, 25 kcal= (25*1000)= 25000 cal.
25 kcal = ____cal
The kilo calorie is a measurement unit of energy. The symbol of kilo calorie is kcal.The kilocalorie is used in measuring the heating, calorific value or metabolizing foods. It equals to 1000 calories, or approximately 4.2 kilojoules. Therefore, 1 kcal= 1000 cal.
so, 25 kcal= (25*1000)= 25000 cal.
