Imagine a container placed in a tub of water, as depicted

Chapter , Problem 5.8

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QUESTION:

Imagine a container placed in a tub of water, as depicted in the accompanying diagram.

(a) If the contents of the container are the system and heat is able to flow through the container walls, what qualitative changes will occur in the temperatures of the system and in its surroundings? What is the sign of q associated with each change? From the system's perspective, is the process exothermic or endothermic?

(b) If neither the volume nor the pressure of the system changes during the process, how is the change in internal energy related to the change in enthalpy? [Sections 5.2 and 5.3]

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QUESTION:

Imagine a container placed in a tub of water, as depicted in the accompanying diagram.

(a) If the contents of the container are the system and heat is able to flow through the container walls, what qualitative changes will occur in the temperatures of the system and in its surroundings? What is the sign of q associated with each change? From the system's perspective, is the process exothermic or endothermic?

(b) If neither the volume nor the pressure of the system changes during the process, how is the change in internal energy related to the change in enthalpy? [Sections 5.2 and 5.3]

ANSWER:

Problem 5.8

Imagine a container placed in a tub of water, as depicted in the accompanying diagram. (a) If the contents of the container are the system and heat is able to flow through the container walls, what qualitative changes will occur in the temperatures of the system and in its surroundings? What is the sign of q associated with each change? From the systems perspective, is the process exothermic or endothermic? (b) If neither the volume nor the pressure of the system changes during the process, how is the change in internal energy related to the change in enthalpy? [Sections 5.2 and 5.3] 350 K 290 K

                                                   Step by step solution

Step 1 of 2

a)

Heat flows into the tube from the container, so that the temperature becomes equal to 320 K. The container's temperature decreases and that of the tub increases.

Heat is denoted by “q”.

Heat for the system is less than zero .

And its surrounding is greater than zero .

Hence, this is an exothermic process as heat is released by the system.

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