Question

A student mixes 100 ml of 0.50 m naoh with 100 ml of 0.50 m hcl in a styrofoam® cup and observes a temperature increase of at,. when she repeats thisexperiment using 200mlof each solution, she observes a temperature change of at2. if no heatis losttothesurroundings or absorbed by the styrofoam cup, what is the relationship betweenat, and at2?

Answer 1

The relationship between initial temperature and final temperature is 2.

Step-by-step explanation:

The reaction of:

HCl + NaOH → H₂O + NaCl + ΔH

Produce heat (ΔH). This heat is evidenced in the increasing of temperature in the system.

If you add 100 mL of 0,50M of both NaOH and HCl you will produce heat, that increase the temperature of the system in X°C.

Now, the addition of 200mL of 0,50M of both NaOH and HCl will produce twice the initial heat increasing the temperature of the system in 2X°C.

That means the relationship between initial temperature and final temperature is 2.

I hope it helps!

Answer 2

The relation between T1 and T2 is T1= T2.

when 200 mL are mixed so, we will have twice the number of moles of water

and twice as much heat will be released this has to heat twice of the mass of the

water, so the temperature rises as the same