An object with a mass of $2 kg$ , temperature of $331 ^oC$ , and a specific heat of $18 (KJ)/(kg*K)$ is dropped into a container with $37 L$ of water at $0^oC$ . Does the water evaporate? If not, by how much does the water's temperature change?

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Answer 1 · 2017-06-29T06:33:33

The water does not evaporate and the change in temperature is $=0.08ºC$

The heat is transferred from the hot object to the cold water.

Let $T=$ final temperature of the object and the water

For the cold water, $Delta T_w=T-0=T$

For the object $DeltaT_o=331-T$

$m_o C_o (DeltaT_o) = m_w C_w (DeltaT_w)$

$C_w=4.186kJkg^-1K^-1$

$C_o=0.018kJkg^-1K^-1$

$2*0.018*(331-T)=37*4.186*T$

$331-T=(37*4.186)/(2*0.018)*T$

$331-T=4302.3T$

$4303.3T=331$

$T=331/4303.3=0.08ºC$

As $T<100ºC$ , the water does not evaporate

An object with a mass of 2 kg2 kg, temperature of 331 ^oC331 ^oC, and a specific heat of 18 (KJ)/(kg*K)18 (KJ)/(kg*K) is dropped into a container with 37 L 37 L of water at 0^oC 0^oC . Does the water evaporate? If not, by how much does the water's temperature change?