Chemistry, 03.07.2019 22:30 Isaiahplater27

Which of the following is kept constant when using a coffee cup calorimeter? temperature density mass pressure

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Answer from: Felixthecat7186

The answer is pressure

Answer from: elsabramasco1161

Pressure

Explanation:

A coffee-cup calorimeter is essentially a constant-pressure calorimeter which is used to measure the enthalpy change (ΔH) in a solution. It comprises of a system of 2 nested styrofoam cups containing water which absorbs the heat from the reaction. A thermometer is inserted through the lid of the cup to record the changes in temperature.

Thus, the heat flow measured at constant pressure, q(p) is the enthalpy change (ΔH) of the reaction

$q_{p}=\Delta H$

The amount of heat absorbed or evolved during a reaction is related to the mass of the substance(m), specific heat capacity (c) and the change in temperature, ΔT

$q_{p}=\Delta H = mc\Delta T$

Answer from: Quest

mechanics (greek is that area of science concerned with the behaviour of physical bodies when subjected to forces or displacements, and the subsequent effects of the bodies on their environment. the scientific discipline has its origins in ancient greece with the writings of aristotle and archimedes[1][2][3] (see history of classical mechanics and timeline of classical mechanics). during the early modern period, scientists such as galileo, kepler, and newton laid the foundation for what is now known as classical mechanics. it is a branch of classical physics that deals with particles that are either at rest or are moving with velocities significantly less than the speed of light. it can also be defined as a branch of science which deals with the motion of and forces on objects. the field is yet less widely understood in terms of quantum theory.

explanation:

Answer from: Quest

explanation:

venn diagram is pictorial representation with of circles showing the relation between two finite sets or things. the intersection part of two circles conveys the relation present in between those sets or things.

here in the venn diagram of sand and salt two circles represent sand and salt. but the area falling under the intersection of these circle represents the mixture of sand and salt.

so, in a venn diagram the mixture will be placed in a middle that is in between the intersection of two circles.

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Which of the following is kept constant when using a coffee cup calorimeter? temperature density ma...

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