17. ΔH rxn is the enthalpy of a reaction. It is the amount of energy or heat absorbed in a reaction. If enthalpy is positive, it means the reaction absorbs heat, which means it is endothermic. If the enthalpy is negative, it means the reaction release heat, which means it is exothermic.
18. yes, it is possible in theory but it is not necessary. Water is the ideal, cheaper, and most abundant liquid for a calorimeter.
19. Specific heat= heat/mass*Temp. the mass is already known You can place the piece of metal in a calorimeter filled with water. the piece of metal and water must be at different temperatures. Ideally, you would heat up the water and let it cool down. This change in temperature in the temperature that goes into the formula for the piece of metal. The only missing value is the heat which can be easily calculated because water' specific heat is known which can be used to calculate the heat loss by the water, which is the same as the heat gain by the piece of metal. With all the three values calculated and measured, you can simply plug them into the formula and solve for the specific heat of the metal.
Answer:
The answer is 12.35
Explanation:
From the question we are given that the concentration of is
Generally The rate equation is given as
and the rate constant has a value
Substituting and making [] the subject we have
Multiply the value by as instructed from the question we have
Answer =
Hence the answer in 2 decimal places is 12.35
<span>3) which is an example of a physical change
</span><span>a) grinding pepper</span>
The proton will move towards the object, since protons are positively charged.
Can u write it more specifically? so that I can answer