Tag Archives: chemistry

Pool Products General

Chemistry Specific Heat Problems

chemistry specific heat problems
chemistry specific heat?

im going over some chemistry problems before school starts back, but i dont understand this specific heat problem…need help.

a sample of metal with a mass 250g is heated to 130 degrees C and dropped into 425g of water at 26 degrees C. The final temperature of the water is 38.4 degress C. What is the specific heat capacity of the metal if 1.2 x 10 ^3 J are lost to the environment?

PLEASE AND THANK YOU!

q (water) = 425 g x 4.18J x ( 38.4 – 26) = 2.20 x 10^4 J
2.20 x 10^4 – 1.2 x10^3 = 2.08 x 10^4
q ( metal ) = – 2.08 x 10^4 J
q ( metal) = 250 g x specific heat x ( 38.4- 130 ) =
– 2.08 x 10^4
specific heat = 0.908 J / g °C

Specific Heat

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Heat Projectiles

heat projectiles
Physics Roller Coaster Loop, projectile motion, and heat help!?

Does a roller coaster loop demonstrate circular motion? If so, why and what is the equation? What is the equation for projectile motion? What is the equation for heat, is it something like average temperature = (g)(c)(degrees)?

Thanks!!

There isn’t one single formula for circular motion
or for projectile motion
or for heat

Physics would take about 10 minutes to learn if there were.

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Pool Chemicals

pool chemicals
What can I use in my swimming pool to increase pH level & alkalinity? Do I have to use actual pool chemicals?

I’ve heard people say you can use baking soda and regular chlorine bleach. I’m not sure which works for pH and/or alkalinity, though.

Raise alkalinity with sodium bicarbonate. Adjust it first, then tweak the pH with soda ash. To lower either one use acid. Muriatic (dilute hydrochloric) is most common. But dry acid is also used. Chlorine is for sanitizing and oxidizing. Before you start dosing your pool with bleach have the calcium hardness checked. If it is too high you might cause the calcium to drop out of solution and stick to the walls/piping/filter/etc. You can create some difficulties for yourself unknowingly by changing suddenly.

The Wonders of: Pool Chemicals