Object A at 40ºC and object B at 80ºC are placed in contact with each other. Which statement describes the heat flow between the objects?

A) Heat flows from object A to object B. B) Heat flows from object B to object A. C) Heat flows in both directions between the objects. D) No heat flow occurs between the objects.

Question

Deleon

Chemistry

12 June, 08:48

Object A at 40ºC and object B at 80ºC are placed in contact with each other. Which statement describes the heat flow between the objects?

A) Heat flows from object A to object B. B) Heat flows from object B to object A. C) Heat flows in both directions between the objects. D) No heat flow occurs between the objects.

+3

Answers (2)

Know the Answer?

Shelby Abbott · Answer 1

By the second law of thermodynamics:

Heat can not spontaneously flow from cold regions to hot regions without external work being performed on a system.

Heat transfer is the passage of thermal energy from a hot (t B = 80° C) to a colder body (t A = 40° C).

Answer: B) Heat flows from object B to object A.

Shea Parker · Answer 2

Option B is right that is Heat flows from object B to object because if 2 bodies have different temperature so heat always transfer from higher to lower, from hot to cold.