Question

PLEASE ANSWER ASAP! DUE TODAY AND IDK WHAT I AM DOING. THANK YOU :)

1. How much heat, in kJ, is required to raise the temperature of 125 g H2O from 2.2C to 48.6C? The specific heat of water is 4.184 J/gC.

2. Given the following thermochemical equation, calculate the heat involved in reacting 12.5 g of water to form the elements H2 and O2.

3. When a 18.5 g piece of a metal originally at 99.5C is placed in 58.5 g of water at 24.0C, the temperature of the water rises to 26.1C. If the specific heat of water is 4.184 J/gC, calculate the specific heat of the metal.

4. When 10 g samples of the following materials absorb 100 J of heat, the temperature increase indicated is observed. Which material has the largest specific heat?

5. Which of the following has the 4s1 valence electron configuration? *answer choices below*

A. Ca2+

B. Na1+

C. Mg

D. K

E. K 1+

Answer 1

7 q=msat = q = 1250 x 4.1843 galoplx (48-6-2-2) => V = 249tet 24267.25 heat required, a = 24-2672KS 2H2o 52 142 + 02 botão 540 cal/gm. : 540 Callom is Latent heat of vap. for conventing and 1 ande . 2 males of cater to andles of H₂ . H₂O - > Ha tha shvap = 540 Callam . For 1 gm.cater, heat reasured azoca? 2 tocallam : 112.5gm " " " 270x12-scal =3375 cal . heat reaureda = 3375 cal -141753 (1cal = 141753 =14.175kJ. 24.25) -14-175KS. Sl. According to calorimetry, when 1 heated body on kept in touch with a cold body, then ay Amount of heat Amount of heat absorbed ose resected by - by the cold the hot body a mas a specificheat = mass of cold body x temp.change Xsp. heat 57. ACCOO body 7 xotemp change monetal X Selal Xotmetal = Mweater & Swater 718.59 Smetal (995-96-1-2-0). * Atacalor 58.5mm