0
What else can I help you with?
What does a negative value for heat represent?
A negative value for heat typically represents heat being released or removed from a system, resulting in a decrease in temperature or a cooling effect. It indicates an exothermic process where energy is being released to the surroundings.
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.
What is the negative heat for water as a ice?
The heat of fusion refers to the energy required to change a substance from a solid to a liquid at its melting point. For water to change from ice to liquid water, heat needs to be added, making the heat of fusion a positive value.
Does heat always flow in the same direction?
Yes, Heat always flows from the coldest to Hottest point in an object
What happens when a system of negative temperature is allowed to exchange heat with a system of positive temperature?
The described situation is only possible if the "negative" temperature is negative relative to some point above a thermodynamic temperature of zero; for example -20 °C is possible, but -20 K is not. With that said, the 2nd law of thermodynamics tells us that the system at negative temperature will warm up - with the temperature becoming less negative and even possibly becoming positive if the positive temperature system is warm enough. Likewise, the temperature of the positive temperature system will become less positive - possibly becoming negative if the negative temperature system is cold enough. The temperatures of the two systems will continue to adjust with the temperatures approaching each other until either the systems are separated to prevent further heat exchange or until they reach the same temperature (thermal equilibrium). All this assumes, of course, that the systems do not exchange mass, nor do they change composition (such as having a reaction going on within one system or the other).
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 >
When heat flows into the system the sign of heat is negative?
No, when heat flows into a system, it is considered positive. Positive heat indicates heat is being added to the system, increasing its internal energy. Negative sign would indicate heat is being lost or leaving the system.
When heat flows into a system what is its value?
When heat flows into a system, its value is positive, indicating an increase in the internal energy of the system. Heat is a form of energy transfer between a system and its surroundings, and when the system absorbs heat, the energy of the system increases.
What does it mean when the heat energy is negative?
A negative value for heat energy typically indicates that heat is being released or removed from a system, resulting in a decrease in temperature. This could occur during processes like heat transfer, where heat flows out of a system, leading to a decrease in thermal energy.
Is it possible for the specific heat of a substance to have a negative value?
No, it is not possible for the specific heat of a substance to have a negative value.
What does a negative value for heat represent?
A negative value for heat typically represents heat being released or removed from a system, resulting in a decrease in temperature or a cooling effect. It indicates an exothermic process where energy is being released to the surroundings.
What is the direction of heat flow from hot to cold in a system?
Heat flows from hot to cold in a system.
If the temperature of a substance increases what can you conclude about the value of q?
The value of q would be negative indicating an endothermic process.
A sample of gas in a syringe releases heat go its surroundings while the plunger us pulled out what are the correct signs of heat and work in this change?
In this scenario, the gas is doing work on its surroundings, so the work is negative. Since heat is being released from the gas to its surroundings, the heat is also negative. The sign convention typically defines work done by the system as negative and heat released from the system as negative.
