Question

I need help in question 3 and please check question 1 and 2!! Thank you !

Post Laboratory Questions 1. A student places 138 g of an unknown metal at 99.9 C into 60.00 g of water at 22.2 CL The entire system reaches a uniform temperature of 31.5 , Calculate the specific heat capacity of the metal. mass of water - 60.009 masso metal - 1989 Initiat tempor Walt)- 22.2°C Inil tempo, mural 94.9°C Final Hemp or wale - 31.5°C fina hemp o maal- 31.500 water đau = Thua Cá đĩa OTW = 31.5*c-22.2*6 = 4.3°C qw = 60.009 (4.184T) 9.3°c) qw=2334.67) metal m. mm Cm om - 2384.675 ATm-31-5*C-49.5°C-- 68.4°C - 2034.675.-(1389) (-68.4°c) (1889) (-68.4") (1983)(-68.4°c) metal might be -2334.6 cm = 0.295 -94 39.2 Mo 0.2501 9°C 2. If the correct specific heat of the metal in problem 1 is 0.25 J/gºC, calculate the percent error. % error = exp-act. %. error -0.25 -0.25 x 100 = 0 / error act 0.25 # 3. While transferring the piece of unknown metal to the calorimeter, the student dropped the metal into the calorimeter and some water splashed out of the calorimeter. a. Why must this be avoided? This must be avoided because there will less water and it will couse that the temp of water increase more because the mass of wate) is less it will affect the mass and the calculation of heat. b. The loss of water from the calorimeter would cause the calculated specific heat capacity to be lower or higher than expected? Explain. The specific heat capacity will be higher than expected

Answer 1

• This question is based on Calorimetry and specific heat capacity.
• I am defining here every term which is used in question.
• Specific heat capacity is a type of energy.
• It is the amount of energy required to raise the temperature of 1 kg of substance by 1 degree celsius temperature.
• It is represented by the symbol 'c'.
• The formula of specific heat capacity is as follows:
• q = m.c.∆T

where,

q = heat energy in Joules (J),

m = mass of a substance (in kg),

c = specific heat (in  J/kg∙K),

∆ = a symbol which means "the change in"

and

T = Temperature.

• Now, I am defining here calorimeter.
• The calorimeter is a device which is used to measure or determine the heat flow of any chemical reaction or we can say which is used to measure physical change. This process of measuring the heat flow of any reaction is called calorimetry.
• A basic calorimeter contains a metal container in which water is present above from combustion chamber, in metal container a thermometer is kept which is used to measure the change in temperature.
• According to question and formula, The answer and calculation of question 1 and 2 is correct.
• The calorimeter consist a metal container in which water is present and a thermometer is also present to measure the temperature change, while transferring the metal if some water is splashed out that would create a major problem in performing the experiment because the fixed mass of metal will become change and the thermometer is also measure the different temperature change so this activity should be avoided and it is necessary for getting the accurate results of experiment.
• The reaction of metal with water is generally exothermic in nature that means heat will given to surrounding from system and temperature of surrounding become increases and temperature change will also become increases. According to formula q = m.c.∆T, if temperature change increases the specific heat capacity will be decreases or lower than expected.