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Chemistry

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Dillan Mraz

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Cards in this guide (14)
How would a catalyst change the reaction energy diagram
Answer

a catalyst speeds up the reaction

A catalyst can change the reaction energy diagram is that a catalyst speeds up the reaction.

How can meat be cooked

Meat can be cooked with anything that produces heat. Other methods for cooking meat can include "curing" which is done with salt rather than heat.

Is plastic a thermal conductor or insulator

It is a thermal insulator

An increase in temperature will cause the rate of a chemical reaction to

increased temperture causes rate or reaction to increase.

Which of the following describes the entropy change of a gas reaction

If there is an increase in the number of gas molecules, then S > 0.

How is the Hvap used to calculate the mass of liquid boiled by 1 kJ of energy

1kJ x 1/deltaHvap x g/mol liquid.

What is Ka for H2CO3 aq H aq HCO3 aq

Ka= [h+][HCO3-]/[H2CO3]

How does increasing the molality in th cells protect the animals

By increasing molality in certain chemicals within their cells they are protecting themselves from freezzing

Which is a statement of the second law of thermodynamics

Entropy tends to increase in a system.

A concentration unit expressed in units of moles of solute per kilogram of solvent

This is called molality.

What phase has the lowest entropy

solid-apex

If 6 moles of a compound produce 84 J of energy what is the delta H reaction in jmol

84 J/6 moles = 14 J/mole = ∆H

What is heat included in the equation of an endothermic reaction

The heat in an endothermic reaction is included as a reactant on the left side of the equation, and has a positive value.

What equation shows how rate depends on concentrations of reactions

The equation is called the rate law equation. For the reaction aA+bB =>cC+dD the rate law would be rate = k[A]^m[B]^n where k is the rate constant and m and n are the "order" with respect to each reactant. m and n must be determined experimentally and may or may not be the same as the coefficients a and b.

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