Question
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PROBLEM SOLVING. Solve the following problems. Show your complete solution. Box ur final answer. Use the extra sheet of paper for this part of examination. A gas is in a closed container and is heated with 10 J of energy causing the lid to rise 2 m with N force. What is the total change in the energy of the system? Use first law of rmodynamics to answer this.

Ask by Ward Gibbs. in the Philippines
Mar 10,2025

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Tutor-Verified Answer

Answer

The total change in the energy of the system is \(10 - 2N\) Joules.

Solution

To solve this problem, we will use the first law of thermodynamics, which states that the total change in the energy of a system is equal to the heat added to the system minus the work done by the system. Given: - Heat added to the system = 10 J - Work done by the system = N force * 2 m First, we need to calculate the work done by the system. Since the force is applied over a distance of 2 m, the work done can be calculated using the formula: \[ \text{Work} = \text{Force} \times \text{Distance} \] Given that the force is N and the distance is 2 m, we can calculate the work done. Next, we will use the first law of thermodynamics to find the total change in the energy of the system. The first law of thermodynamics is given by: \[ \Delta E = Q - W \] where: - \( \Delta E \) is the total change in the energy of the system - \( Q \) is the heat added to the system - \( W \) is the work done by the system Now, let's calculate the work done and then use the first law of thermodynamics to find the total change in the energy of the system. Simplify the expression by following steps: - step0: Solution: \(N\times 2\) - step1: Reorder the terms: \(2N\) Calculate or simplify the expression \( 10 - 2N \). Simplify the expression by following steps: - step0: Solution: \(10-2N\) The work done by the system is \(2N\) Joules. Now, we can use the first law of thermodynamics to find the total change in the energy of the system: \[ \Delta E = Q - W \] Substitute the values: \[ \Delta E = 10 - 2N \] Therefore, the total change in the energy of the system is \(10 - 2N\) Joules.

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Beyond the Answer

To solve this problem, we can use the first law of thermodynamics, which states that the change in the internal energy of a system (ΔU) is equal to the heat added to the system (Q) minus the work done by the system (W). Mathematically, it can be expressed as: ΔU = Q - W In this scenario, the gas receives 10 J of energy (Q = 10 J), and the work done by the gas when the lid rises can be calculated by the formula: W = F × d where F is the force applied, and d is the distance (2 m). To find the total work done, we need to know the force (N). If we assume a force of 5 N as an example: W = 5 N × 2 m = 10 J Now we can substitute the values into the first law equation: ΔU = Q - W = 10 J - 10 J = 0 J Thus, the total change in the energy of the system is: \(\boxed{0 \, \text{J}}\)

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