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pnicole
Group Title
When 155 mL of water at 26 C is mixed with 75 mL of water at 85 C, what is the final temperature? (Assume that no heat is lost to the surroundings; d of water 1.00 g/mL.)
 2 years ago
 2 years ago
pnicole Group Title
When 155 mL of water at 26 C is mixed with 75 mL of water at 85 C, what is the final temperature? (Assume that no heat is lost to the surroundings; d of water 1.00 g/mL.)
 2 years ago
 2 years ago

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pnicole Group TitleBest ResponseYou've already chosen the best response.0
Someone please help, I really don't know where to begin or how to solve this. :( Even just an equation will do.
 2 years ago

wach Group TitleBest ResponseYou've already chosen the best response.0
I'm not that familiar with this exact calculation, so excuse me if I'm wrong. The equation for this should be : ( Volume1 * Temp1) + (Volume2 * Temp2) / (Volume1 + Volume2) = Final temp
 2 years ago

NoelGreco Group TitleBest ResponseYou've already chosen the best response.1
The amount of heat a substance gains or loses is governed by the following formula: \[Q=mc \Delta T\] Where Q is the heat lost or gained, m is the mass in kg, c is the specific heat of the substance (c1.00 for water), and deltaT is the change in temperature. Since the heat gained by the cold water is = to the heat lost by the warm water the two Qs can are equal. Thertefore: \[m _{c} \Delta T _{c }=m _{w}\Delta T _{w}\] The c and w subscripts are for the cold and warm water. Since both waters are at the same final temperature: \[m _{c}(T _{f}26)=m _{w}(85T _{f})\] where T sub f is the final temp for both masses of water. The expressions in the parentheses were switched because you always want a positive delta T.
 2 years ago

pnicole Group TitleBest ResponseYou've already chosen the best response.0
Thank you so much!
 2 years ago
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