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When heat flows into a system its value is When heat flows out of a system its value is negative?
Wiki User
∙ 14y ago
Heat is energy and cannot be negative, If you are talking about heat flow then if you define outflow to be negative then inflow is positive.
Wiki User
∙ 12y ago
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What does a negative value for heat represent?
The Short Answer = Cooling.
What is the first law of thermodynamics applied to closed and open system showing the meaning of the positive and negative sign of heat and work?
The first law of thermodynamics states that: "The internal energy of a system is a function of its state. Any increase in the internal energy of a system is equal to the sum of the heat supplied to the system and the work done on the system." In equations, this is stated as: DU = DQ + DW where DU is the INCREASE in internal energy DQ is the heat SUPPLIED DW is the work done ON the system So, if heat is lost by the system, it means that DQ is negative and if work is done by the system, it means that DW is negative. The best way to answer thermodynamics questions involving the first law is to think logically about what calculations should be made. If you do this, you will never make mistakes about signs.
Why is the transfer of energy in an ecosystem referred to as energy flow not energy cycling?
Entropy. To "cycle" the energy would need to be reused, in reality the energy flows in from the outside and flows back out. (If the system were energy blocked, then all the energy would convert to heat and thus be useless.)
What is heat system?
This is a system to produce heat.
The main process by which heat flows upward through the lithosphere is?
Radiation
When heat flows into a system its value is positive. When heat flows of a system its value is negative.?
when heat flows Out of a system
When flows into a system its value is positive. When heat flows out of a system its value is negative.?
heat
When what flows into a system it's value is positive when heat flows out of the system it's value is negative?
heat. apex.
When heat flow into a system it's value is when heat flows out of a system it's value is negative?
positive < Mitzy >
What does a negative value for heat represent?
The Short Answer = Cooling.
What is a endopthermic reaction?
An endothermic reaction is a reaction where heat flows from the surroundings in to the system. Holding an cold pack to your skin is an endothermic reaction; heat flows from your skin (surroundings) into to the cold pack (system).
What flows through organisms and the environment and eventually flows out of the biosphere?
It flows back as heat.
What heat flows easily in?
Heat flows easily in a good thermal conductor.
What is heat of reaction and enthalpy of reaction?
Heat of reaction and enthalpy of reaction are the same thing. Enthalpy, or the heat transfer, cannot be measured, however we can measure the CHANGE of enthalpy which is shown by a value of ∆H. This measured in kilojoules per mole of reactant. (KJ/mol)This value may be positive or negative. For endothermic reactions (which absorb heat), the ∆H value is always positive. For exothermic, where heat is released, the value is negative.
What best describes how heat flows?
heat flows from a warmer object to a cooler object.
What do heat flows from?
heat flows everything, from a warmer substance to a cooler substance to maintain equilibrium.
Why is it important how heat flows?
It is important how heat flows because if heat didn't flow the way it does it would be to cold and we wouldn't be here.
