Virtual Labs

Interpret the Energy Balance sheet and Material Balance sheet

What is the primary goal of material balance in a process?

a: To minimize energy consumption Explanation

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b: To maximize profit Explanation

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c: To account for the quantities of materials entering and leaving a system Explanation

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d: To optimize process conditions Explanation

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Which of the following is NOT a type of material balance?

a: Overall material balance Explanation

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b: Component material balance Explanation

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c: Energy balance Explanation

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d: Atomic material balance Explanation

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A process involves the reaction of 100 kg of A with 200 kg of B to form 250 kg of C and 50 kg of D. What is the degree of freedom for this system?

a: 1 Explanation

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b: 2 Explanation

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c: 3 Explanation

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d: 4 Explanation

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What is the difference between a closed system and an open system in material balance?

a: Closed system has no inputs or outputs, while open system has both Explanation

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b: Closed system has inputs but no outputs, while open system has both Explanation

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c: Closed system has outputs but no inputs, while open system has both Explanation

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d: Closed system has both inputs and outputs, while open system has neither Explanation

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A stream has a flow rate of 100 kg/h and a composition of 80% A and 20% B. What is the flow rate of A in kg/h?

a: 80 kg/h Explanation

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b: 100 kg/h Explanation

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c: 120 kg/h Explanation

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d: 200 kg/h Explanation

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What is the purpose of a tie component in material balance?

a: To calculate the flow rate of a stream Explanation

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b: To calculate the composition of a stream Explanation

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c: To provide an additional equation to solve for unknowns Explanation

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d: To simplify the material balance equations Explanation

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A process involves the mixing of two streams, each with a flow rate of 50 kg/h. If the composition of one stream is 70% A and 30% B, and the other stream is 30% A and 70% B, what is the composition of the resulting stream?

a: 50% A and 50% B Explanation

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b: 60% A and 40% B Explanation

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c: 40% A and 60% B Explanation

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d: 70% A and 30% B Explanation

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What is the energy balance equation for a system with no reaction?

a: ΔE = Q - W Explanation

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b: ΔE = Q + W Explanation

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c: ΔE = ΔH - Q Explanation

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d: ΔE = ΔH + Q Explanation

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A process involves the heating of a stream from 20°C to 80°C. If the heat capacity of the stream is 2 kJ/kg°C, what is the energy required to heat 100 kg of the stream?

a: 120 kJ Explanation

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b: 240 kJ Explanation

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c: 360 kJ Explanation

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d: 480 kJ Explanation

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What is the difference between the internal energy (U) and enthalpy (H) of a system?

a: U is a state function, while H is a path function Explanation

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b: U is a path function, while H is a state function Explanation

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c: U includes kinetic energy, while H includes potential energy Explanation

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d: U includes potential energy, while H includes kinetic energy Explanation

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