What is the heat of a system when it expands by 0.67 m^3?

In summary, the problem involves finding the heat of a system that expands by 0.67 m^3 at a constant pressure of 105 kPa, given that its internal energy decreases by 1710J. The solution involves using the equation deltaU=Q-W and W=PdeltaV. After plugging in the numbers and solving for W, the correct answer can be obtained.
  • #1
map7s
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Homework Statement


A system expands by 0.67 m^3 at a constant pressure of 105 kPa. Find the heat of the system if its internal energy decreases by 1710J.


Homework Equations


Since P=constant:
deltaU=Q-W
W=PdeltaV


The Attempt at a Solution


I tried plugging in the numbers to the equation for W and then plugging that value into the first equation to solve for U, but I didn't get the correct answer and I'm not sure where I went wrong.
 
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  • #2
Nobody will know where you went wrong if you don't say what you plugged into where and what came out of that process.
 
  • #3
sorry, but while I was typing my process just now I realized what went wrong. Thank you!
 

FAQ: What is the heat of a system when it expands by 0.67 m^3?

What is the definition of heat in a system?

Heat is the transfer of thermal energy from one object to another due to a temperature difference. In a system, heat is the measure of the internal energy that is transferred between the system and its surroundings.

How do you calculate the heat of a system?

The heat of a system can be calculated by multiplying the mass of the system by its specific heat capacity and the change in temperature. The formula is Q = mCΔT, where Q is the heat, m is the mass, C is the specific heat capacity, and ΔT is the change in temperature.

What factors can affect the heat of a system?

The heat of a system can be affected by various factors such as the type of material, its mass, specific heat capacity, and the temperature difference between the system and its surroundings. Other external factors such as pressure, volume, and the presence of other substances can also affect the heat of a system.

How is heat different from temperature?

Heat and temperature are often used interchangeably, but they are not the same. Temperature is a measure of the average kinetic energy of the particles in a substance, while heat is the transfer of thermal energy due to a temperature difference. In other words, temperature is a measure of the intensity of heat, while heat is a measure of the quantity of thermal energy.

What is the importance of finding the heat of a system?

Finding the heat of a system is crucial in understanding the thermodynamic properties of a system and its surroundings. It helps in predicting the behavior of a system in different conditions and allows for the optimization of processes. It also plays a significant role in various fields such as engineering, chemistry, and physics.

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